Sweet Potato & Feta Gratin with Walnuts Recipe

If you’re looking to impress with a dish that sings with layers of flavor, texture, and a beautiful pop of color, the Sweet Potato & Feta Gratin with Walnuts is your new go-to. This vibrant Mediterranean-inspired dish combines earthy beets, sweet and tender sweet potatoes, sharp feta cheese, and the delightful crunch of toasted walnuts in a perfectly baked gratin. It’s comfort food elevated—simple to make but stunning enough for guests or a cozy family dinner. Every bite is a melody of sweet, salty, and nutty notes that you’ll want to savor again and again.

Ingredients You’ll Need

The magic of this Sweet Potato & Feta Gratin with Walnuts lies in its straightforward, wholesome ingredients. Each component adds its unique touch, from the sweetness of the beets and sweet potatoes to the creamy saltiness of feta, all tied together with herbs and crunchy walnuts.

• 2 medium beets, peeled and thinly sliced: Adds earthy sweetness and vibrant color that brightens the dish.
• 1 large sweet potato, peeled and thinly sliced: Brings tender, natural sweetness and a lovely creamy texture once baked.
• 1 small red onion, thinly sliced: Provides a mild sharpness and a touch of color contrast.
• 2 tbsp olive oil: Helps everything roast beautifully and infuses a subtle fruity flavor.
• ¾ tsp salt: Essential for seasoning and bringing out the natural flavors of the vegetables and cheese.
• ½ tsp black pepper: Adds gentle warmth and depth.
• ½ tsp dried thyme or oregano: Brings an herbaceous, Mediterranean aroma that ties the dish together.
• ¾ cup crumbled feta cheese: Offers tangy creaminess and a salty kick in every layered bite.
• ¼ cup walnuts, toasted and chopped: Introduces a crunchy texture and nutty richness for contrast.
• ¼ cup grated Parmesan cheese (optional): Adds extra savory depth and enhances gratin’s golden crust.
• 1 clove garlic, minced: Brightens the flavors with a fragrant punch between the layers.

How to Make Sweet Potato & Feta Gratin with Walnuts

Step 1: Preheat and Prepare

Start by preheating your oven to 200°C (400°F), then lightly grease a baking dish to prevent sticking and ensure easy serving. This simple setup primes your kitchen for the delicious layering ahead.

Step 2: Toss the Vegetables

Combine the thinly sliced beets, sweet potato, and red onion in a bowl. Drizzle the olive oil over them, then season with salt, pepper, and your choice of thyme or oregano. Toss gently to coat every piece evenly—this blend of oil and seasoning is what allows the vegetables to roast tenderly and bring out their best flavors inside the gratin.

Step 3: Layer the Gratins

Begin layering your vegetables carefully in the greased baking dish. Alternate beets, sweet potatoes, and onions for visual appeal and taste complexity. As you layer, sprinkle minced garlic and crumbled feta between each vegetable tier to ensure a luscious, well-seasoned bite throughout. Repeat the process until all ingredients are used, making sure the topmost layer is vegetables. Finally, scatter the toasted, chopped walnuts and optional Parmesan cheese over the top to promise a golden, crunchy finish.

Step 4: Bake to Perfection

Cover the dish with foil and bake for 30 minutes to allow the veggies to soften and flavors to meld. Remove the foil and continue baking for another 15 to 20 minutes, letting the top brown beautifully and the walnuts toast lightly in the oven’s warmth. The result is a gratin that’s tender on the inside with a satisfyingly crisp surface.

Step 5: Rest and Ready to Serve

Once baked, let your Sweet Potato & Feta Gratin with Walnuts rest for about five minutes. This brief pause helps it firm up slightly and makes slicing easier, while allowing the flavors to settle and mingle fully. Then, slice it up and get ready to wow your table!

How to Serve Sweet Potato & Feta Gratin with Walnuts

Garnishes

Enhance your presentation with a sprinkle of fresh herbs like parsley or thyme for a pop of green and freshness. A drizzle of high-quality olive oil or a balsamic reduction can add a glossy finish and an extra layer of flavor, making your gratin look as enticing as it tastes.

Side Dishes

This gratin pairs beautifully with roasted meats such as chicken or lamb, thanks to its rich, sweet, and tangy layers. For vegetarian meals, serve it alongside a crisp green salad dressed lightly with lemon vinaigrette for balance and brightness.

Creative Ways to Present

For dinner parties, try serving individual portions in small ramekins or create a gratin bar with varied toppings like toasted pine nuts or fresh mint alongside, letting guests customize their plates. This adds a fun interactive element to enjoying your Sweet Potato & Feta Gratin with Walnuts.

Make Ahead and Storage

Storing Leftovers

Store any leftover gratin in an airtight container in the refrigerator for up to 3 days. It keeps wonderfully well and gives you a quick snack or side dish for the next few meals.

Freezing

You can freeze the gratin in a single or portion-sized container for up to 2 months. Just make sure it’s completely cooled before freezing to preserve texture and flavor. Thaw overnight in the fridge before reheating.

Reheating

Reheat leftovers in a preheated oven at 180°C (350°F) until warmed through, roughly 15-20 minutes. This method helps maintain the lovely crisp top, unlike microwaving, which can make it soggy.

FAQs

Can I substitute the walnuts with another nut?

Absolutely! Pecans or almonds make excellent alternatives, offering their own unique crunch and flavor profiles while still complementing the sweet potatoes and feta.

Is it possible to make this gratin vegan?

Yes, by swapping feta and Parmesan for vegan cheeses or a plant-based ricotta, you can enjoy a vegan-friendly version without losing much of the delightful creaminess and texture.

Can I prepare this dish ahead of time before baking?

Definitely. Assemble the gratin in your baking dish, cover tightly, and refrigerate for up to 24 hours. When ready, bake as directed, adding a few extra minutes if baking straight from the fridge.

What is the best way to slice the vegetables thinly?

Using a mandoline slicer is ideal for uniform thin slices, which ensures even cooking and an elegant layered look. If you don’t own one, a sharp knife and steady hand work well too.

Can I add other vegetables to the gratin?

Sure! Thin slices of zucchini or eggplant would blend nicely and add more texture and color while keeping the Mediterranean spirit alive.

Final Thoughts

There is something truly special about the Sweet Potato & Feta Gratin with Walnuts—it combines simple ingredients into a dish that feels both vibrant and comforting. Whether you’re cooking for friends or treating yourself to a nourishing meal, this gratin promises warmth, flavor, and a little bit of kitchen magic. Give it a try and watch it become one of your cherished recipes in no time!