One Dish Sweet Potato Chicken Gratin for Hashimotos Easy

There’s something quietly comforting about sliding a bubbling casserole dish out of the oven on a weeknight golden edges, tender chicken, sweet potato layers all creamy and soft. One Dish Sweet Potato Chicken Gratin is that kind of meal: cozy, nourishing, and you only dirty one pan.

I started making this during a foggy October when my Hashimoto’s was acting up and I needed something gentle but filling. Turns out the selenium in chicken really helps support thyroid function who knew? After testing this a dozen times in my kitchen (and tweaking the cream ratio twice), I’ve learned that slicing the sweet potatoes thin is the secret to getting them tender without pre-cooking.

Olivia Farnsworth

One Dish Sweet Potato Chicken Gratin for Hashimotos Easy

This one dish sweet potato chicken gratin is both thyroid friendly and perfect for a Hashimotos recipe. Packed with anti inflammatory ingredients and selenium rich components, it supports hypothyroid wellness while delivering comforting, wholesome flavors in every bite.

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Prep Time 5 minutes mins

Cook Time 35 minutes mins

Total Time 40 minutes mins

Servings: 3 servings

Ingredients Method Notes

Ingredients

  

• 4 tablespoons extra virgin olive oil
• 1 small red onion (⅛ pound), thinly sliced
• 15 garlic cloves
• 3 cups finely chopped kale
• ½ pound shredded chicken
• 1 cup full fat coconut milk
• 1 handful fresh thyme
• 3 medium sweet potatoes (¾ pound each), peeled and thinly sliced (abpit ⅛-inch thick)
• 2½ teaspoons sea salt

Method

 

1. Set your oven to 400°F and grease a large casserole dish lightly.
2. Heat the olive oil in a spacious skillet, then toss in the garlic and onion slices. Cook gently for about one minute until fragrant.
3. Add the kale and shredded chicken into the skillet and continue cooking on medium heat for around three minutes until the kale softens.
4. Pour the coconut milk in along with the fresh thyme, and bring the mixture to a boil.
5. Stir in the sliced sweet potatoes and sprinkle with sea salt. Lower the heat and simmer gently for 7 to 10 minutes.
6. Transfer the entire mixture carefully from the skillet into your prepared casserole dish.
7. Place in the oven and bake for 15 to 20 minutes, or until the sweet potatoes are tender and have absorbed the creamy coconut milk.

Notes

• This gratin is best enjoyed fresh but can be stored in an airtight container in the fridge for up to 1-2 days. For a moister texture, reduce baking time to 10 minutes. Baking time may vary depending on sweet potato slice thickness, sweet potato variety, your location, and oven temperature.

Why You’ll Love This One Dish Sweet Potato Chicken Gratin

This is the kind of meal that makes a Tuesday feel like a Sunday. Creamy coconut milk, tender sweet potatoes, and perfectly seasoned chicken all baked together until golden and bubbling. You’ll love that everything cooks in one dish less cleanup, more time curled up on the couch.

• Truly one-pan: The skillet does the heavy lifting, then it all goes into the casserole dish to finish. No juggling multiple pots.
• Thyroid-friendly bonus: Chicken is naturally rich in selenium, which supports thyroid function a gentle win if you’re managing Hashimoto’s or just want hormone-balancing meals.
• Cozy but light: The coconut milk makes it creamy without dairy, and the kale adds color and nutrients without feeling heavy.
• Beginner-approved: If you can slice sweet potatoes and sauté garlic, you’ve got this.

Key Ingredients You’ll Need

Everything here is simple and whole no mystery ingredients or hard-to-find items. Here’s what makes this gratin so nourishing and delicious:

• Sweet potatoes: Slice them thin (about ⅛-inch) so they cook evenly and soak up all that creamy coconut goodness.
• Shredded chicken: Use rotisserie chicken or leftover roasted chicken to save time. It adds protein and that cozy, savory depth.
• Full-fat coconut milk: This creates the creamy base. Don’t swap for lite you want the richness here.
• Kale: Adds a pop of green and wilts down beautifully. It’s hearty enough to stand up to baking.
• Garlic and red onion: Fifteen cloves sounds like a lot, but they mellow and sweeten as they cook. Trust me.
• Fresh thyme: Just a handful brings earthy, aromatic warmth that ties everything together.

How to Make It Step-by-Step

This comes together faster than you’d think. The stovetop does most of the work, then the oven finishes it off with tender, golden perfection.

Pro Tip: If your sweet potato slices are thicker than ⅛-inch, add a few extra minutes to the stovetop simmer. They’ll absorb the coconut milk better and bake more evenly.

Tips for Perfect Results Every Time

After testing this recipe more times than I can count, here are the little tricks that make all the difference:

• Slice evenly: Use a mandoline or sharp knife to get uniform sweet potato slices. It helps them cook at the same rate.
• Don’t skip the simmer: Those 7–10 minutes on the stovetop let the sweet potatoes start softening and soak up flavor before baking.
• Want it saucier? Bake for just 10 minutes instead of 15–20. The sweet potatoes will still be tender, but you’ll have more creamy coconut milk pooling at the bottom.
• Check your oven: Baking times vary based on your oven’s heat and the type of sweet potato. Start checking at 15 minutes with a fork.

Serving and Storage

This gratin tastes best fresh from the oven when the edges are just starting to crisp and the coconut milk is silky. Serve it straight from the casserole dish with a big spoon no fuss, all comfort.

Note: The sweet potatoes absorb liquid as they sit, so leftovers will be a bit drier. A splash of coconut milk when reheating brings back some of that creaminess.

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FAQs (One-Dish Sweet Potato-Chicken Gratin)

You’re Going to Love This Cozy One-Pan Gratin

From start to finish, this One Dish Sweet Potato Chicken Gratin takes about 35 minutes and delivers tender, creamy layers with golden edges and a rich coconut aroma. You’ll love how it turns out comforting, nourishing, and practically cleans itself up. It’s the kind of meal that makes you want to linger at the table a little longer.

Try adding a handful of spinach or chard if you’ve got it on hand, or swap thyme for fresh rosemary when the mood strikes. A drizzle of good olive oil before baking adds a lovely richness. I learned from my grandmother to taste the coconut milk as you simmer if it’s too thin, let it reduce just a bit more. Leftovers reheat beautifully with a splash of broth or extra coconut milk to bring back that silky texture.

I’d love to see your version of this gratin tag me with your photos or tell me what you served alongside it. Did your family have a favorite one-dish dinner growing up? Save this recipe for a friend who needs a little midweek comfort, or keep it tucked away for your next cozy night in. Here’s to nourishing meals that support your thyroid journey and warm you from the inside out.