Healthy Sweet Potato Gratin Recipe (2024)

by Lindsey Johnson
75 · · Updated · Post may contain affiliate links.

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I'll be honest - I've never been a fan of marshmallow-topped sweet potatoes. I know, I'm probably in the minority with that sentiment, but hey, it's honest.

Instead, we like a more savory sweet potato gratin to accompany our Thanksgiving feast. This year I'm including this healthy sweet potato gratin on our menu.

Healthy Sweet Potato Gratin Recipe (1)

Healthy Sweet Potato Gratin Recipe

Typically gratins include loads of butter, cream and cheese. But this sweet potato gratin gives all other gratins a healthy makeover.

It still has cheese - just enough to be delicious. Leeks and fresh sage are added for extra flavor in place of butter and cream.

Healthy Sweet Potato Gratin Recipe (2)Leeks, if you haven't used them before, are in the onion family. They add a great onion flavor without being too overpowering.

A hint of fresh nutmeg adds another little something to the dish. The sweet potatoes are very thinly sliced and layered with the leeks. The flavors meld together as the gratin bakes.

Healthy Sweet Potato Gratin Recipe (3)This is really easy to make - it can also be made the day before and reheated. Another plus when you're busy doing other meal prep and don't want to worry about it.

What's your favorite way to enjoy sweet potatoes for Thanksgiving?

Healthy Sweet Potato Gratin Recipe (4)

Healthy Sweet Potato-Leek Gratin

A healthier version of a classic potato gratin made with leeks for extra flavor and topped with grated Parmesan.

Prep Time20 minutes mins

Cook Time55 minutes mins

Total Time1 hour hr 15 minutes mins

Course: side

Cuisine: American

Keyword: sweet potato

Servings: 8

Author: Lindsey Rose Johnson

Cost: $15

Equipment

  • Large bowl

  • Skillet

  • 8"x11" baking dish

Ingredients

  • 2 tablespoons extra-virgin olive oil divided
  • 2 medium leeks white and tender green parts only, thinly sliced crosswise
  • Coarse salt and ground pepper
  • 1 Tablespoon finely minced fresh sage or 1 teaspoon dried
  • ¼ teaspoon freshly grated nutmeg
  • 2 pounds sweet potatoes peeled and sliced ⅛-inch thick
  • ½ cup freshly grated Parmesan cheese

Instructions

  • Preheat the oven to 350°F.

  • Place leeks in a very large bowl of water. Separate them into rings and swish around in water to loosen the dirt. Strain off the water and rinse briefly, then allow excess water to drain off. (A salad spinner works great for this.)

  • In a 10-inch skillet, heat 2 Tablespoons of the olive oil over medium heat. Add leeks. Cook, stirring frequently, until leeks start to soften. Add a little water, if needed, to prevent them from burning. Season with a little salt and pepper. Add the minced fresh sage, and cook for another 1-2 minutes.

  • Lightly oil the bottom and sides of an 8- by 11-inch baking dish. Arrange ½ of the sweet potato slices over the bottom of the baking dish. Season well with salt and pepper. Top with half of the leeks and sprinkle with a little freshly grated nutmeg. Repeat with remaining sweet potato slices and leeks, again seasoning well with salt and pepper, and a sprinkle of fresh nutmeg.

  • Cover the top of the dish tightly with aluminum foil. Bake for 40-45 minutes. Remove from oven and uncover. Sprinkle cheese over the top. Raise the oven temperature to 450°F and bake for another 10 minutes, or until the cheese is golden brown. Let cool for a few minutes before serving.

Notes

This is really easy to make - it can also be made the day before and reheated. Another plus when you're busy doing other meal prep and don't want to worry about it.

Adapted from: Martha Stewart

Photos by Ana Stanciu

75

Reader Interactions

Comments

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  1. Audry says

    This is probably one of the best sweet potato recipes I have ever had. I will definitely be making this again! Thank you!!

    Reply

  2. Dsayko says

    If you were going to make this a day ahead, would you bake until before adding the cheese and do the cheese after you reheat the next day?

    Reply

    • Lindsey Johnson says

      You could do that, certainly. But it's also fine to make it all the way and reheat, or if you wanted, you could just prep it and bake the next day.

      Reply

  3. Jill Symes says

    Been looking for a recipe for using up sweet potatoes. Being from Wales I am used to leeks and put them in lots of things - fab in a quiche with cheese and bacon. Gonna try this tmro with the Sunday roast.

    Reply

  4. Rebecca L says

    My grocery store doesn't carry leeks. What would you suggest as a substitute - just slice a yellow onion?

    Reply

    • Lindsey Johnson says

      That would be fine! You could also sub green onions. Or you can just leave them out.

      Reply

  5. Nancy says

    My sister-in-law made the sweet potato gratin a couple of months ago and it was delish. I'm trying it today and Thanksgiving day.

    Reply

  6. Amy Anderson says

    I tried this tonight and it's AMAZING!! Thank you for this!

    Reply

  7. Eileen Wolf says

    I'm not a big fan either of marshmallow topped sweet potatoes dishes, so we're both in the minority. I feel like I'm eating a dessert rather than a side dish. I was asked to bring a sweet potato dish on Thursday, so I'm looking forward to trying this. Leeks are one of my favorites.

    Reply

  8. Katherine says

    My mouth is watering just looking at the pictures. I'm very excited to try this. Plus it's not expensive to make. Thanks for the idea.

    Reply

  9. Rebecca says

    Love this idea! These look so sophisticated. Pinning this!

    Reply

    • Lindsey Johnson says

      Thanks, Rebecca!

      Reply

Healthy Sweet Potato Gratin Recipe (2024)

FAQs

What is the healthiest way to eat sweet potatoes? ›

Boiling sweet potatoes retains more beta-carotene and makes the nutrient more absorbable than other cooking methods such as baking or frying. Up to 92% of the nutrient can be retained by limiting the cook time, such as boiling in a pot with a tightly covered lid for 20 minutes.

Are sweet potatoes healthy for weight loss? ›

Absolutely. Besides their health benefits, sweet potatoes are a great addition to any weight loss diet. First up, they're very high in fibre — especially soluble fibre. Soluble fibre is excellent because it slows down your digestion and helps you feel full, which can curb the urge to snack between meals.

Are sweet potatoes anti inflammatory? ›

The beta-carotene in sweet potatoes has been shown to fight inflammation, and eating them regularly can help ease joint pain and other symptoms of inflammatory conditions like arthritis. If you're looking for a delicious way to reduce inflammation, add some sweet potatoes to a salad or bake alongside protein!

Can I eat sweet potato everyday? ›

If you enjoy sweet potatoes, you can absolutely enjoy them daily. However, eating multiple sweet potatoes every day could cause a harmless condition called carotenodermia, where your skin turns yellow-orange. You may also want to be cautious about your sweet potato intake if you have a history of kidney stones.

Is sweet potatoes healthy or unhealthy? ›

They're high in fiber and antioxidants, which protect your body from free radical damage and promote a healthy gut and brain. They're also incredibly rich in beta carotene, which is converted to vitamin A to support good vision and your immune system.

Are sweet potatoes better for weight loss than regular potatoes? ›

Sweet potatoes are very low in calories, so they can be included in a weight-loss diet. Sweet potatoes are said to have about 86 calories per 100 g and roughly 100 calories per dish. However, a roughly equivalent amount (100 g) of peeled potato contains approximately 110 calories per serving, or 400 calories total.

When should you not eat sweet potatoes? ›

How to tell if sweet potatoes have gone bad. If your sweet potato is soft in spots, smells rotten, or oozes a mysterious liquid, that potato should be discarded. Another sign that sweet potatoes have taken a turn for the worse is if they start growing stalky purplish sprouts.

Do sweet potatoes burn belly fat? ›

Sweet potatoes are rich in fibre, which can help you lose weight and belly fat. The high fibre content of sweet potatoes makes you feel 'full' after your meal, helping you stick to a calorie-restricted diet. The root vegetable also contains a specific kind of fibre called resistant starch.

What are the disadvantages of sweet potatoes? ›

Consuming sweet potatoes in excess can result in sweet potato side effects such as Vitamin A toxicity, which is manifested in skin rashes and headaches. Due to high fibre content, excess intake of sweet potatoes can result in bloating, stomach pain and diarrhoea.

What organ does sweet potato help? ›

Just one sweet potato gives you 102% of the vitamin A you need each day. This helps keep your eyes healthy as well as your immune system, your body's defense against germs. It's also good for your reproductive system and organs like your heart and kidneys.

What is the number 1 inflammatory food? ›

In particular, experts recommend avoiding these inflammatory foods: Red meat, such as steak and hamburgers. Processed meat, such as bologna, bacon, sausage and lunchmeat. Commercial baked goods such as snack cakes, pies, cookies and brownies.

What is the #1 anti-inflammatory food? ›

Top 8 Anti-Inflammatory Foods You Should Eat
  • Dark, leafy greens. Save. Vegetables like kale, spinach, and swiss chard pack a high antioxidant punch. ...
  • Colorful fruits. Save. ...
  • Ginger and turmeric. Save. ...
  • Nuts. Save. ...
  • Green Tea. Save. ...
  • Chia seeds and flaxseeds. Save. ...
  • Fatty fish. Save. ...
  • Beans. Save.

How many times a week should you eat sweet potatoes? ›

Because of their higher sugar levels and high vitamin A content, you can likely enjoy them in moderation about two or three times per week. Eating these vegetables too often could lead to too much vitamin A intake or increase the potential for negative effects on your blood sugar.

Is there a lot of sugar in sweet potatoes? ›

One cup of raw sweet potato contains about 114 calories, 27 grams of carbohydrates, 6 grams of sugar, 2 grams of protein and 0 grams of fat. One cup of white potato has 116 calories, 26 grams of carbohydrates, 1 gram of sugar, 3 grams of protein and 0 grams of fat.

Can you eat just a sweet potato for dinner? ›

An entire roasted sweet potato is a fine thing, especially if mashed and fattened up for supper. But most of us can only eat so many.

Is it healthier to bake or microwave a sweet potato? ›

It's really the best way. Microwaving sweet potatoes cuts down cook time by 45 to 55 minutes, and, according to a 2018 study, helps maintain the potato's nutritional value. All cooking methods cause foods to lose some of their nutrients, but the quicker your potato cooks, the more nutrients it will retain.

Which is better baked or boiled sweet potatoes? ›

Baking can also cause an 80% drop in vitamin A levels, twice as much as boiling. Therefore, from a nutritional standpoint, boiling rather than baking should be recommended for cooking sweet potato.

Are sweet potatoes healthier cooked or raw? ›

The nutrition facts for raw and baked sweet potatoes can be vastly different. One cup of raw sweet potato may contain 114 calories, 26.8 grams of carbs and 5.6 g sugar, whereas one cup of baked sweet potato may contain 180 calories, 41.4 g carbs and 16.9 g sugar. That's a big increase in carbs and sugars.

Is it healthier to steam or bake sweet potatoes? ›

Steaming is also one of the best ways to keep sweet potatoes' nutrients intact; their naturally high vitamin, potassium, fiber, and beta-carotene content won't be burned off in a steamer basket. Both boiling and steaming also keeps the potatoes' glycemic index down, meaning less of a blood sugar spike for you.

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