Mediterranean Layered Beet, Sweet Potato & Feta Gratin with Walnuts

This Mediterranean-inspired gratin is a colourful, nutrient-dense baked dish featuring earthy beets, naturally sweet potatoes, creamy feta, and crunchy walnuts. It’s layered like a casserole but eats like a gourmet side dish or light vegetarian main. The combination of sweet, salty, creamy, and nutty flavours makes it both comforting and elegant.

Ingredients

For the Gratin

• 2 medium beets, peeled and thinly sliced
• 2 large sweet potatoes, peeled and thinly sliced
• 3 tablespoons olive oil
• 1 teaspoon salt
• ½ teaspoon black pepper
• 1 teaspoon dried thyme
• 2 cloves garlic, minced

For the Layers & Topping

• ¾ cup crumbled feta cheese
• ½ cup walnuts, roughly chopped
• ½ teaspoon dried oregano (optional)
• 1–2 tablespoons honey or balsamic glaze (optional drizzle)
• Fresh parsley for garnish

Full Recipe

Step 1: Prepare the Vegetables

1. Preheat oven to 375°F (190°C).
2. Slice beets and sweet potatoes very thinly using a knife or mandoline for even cooking.
3. Lightly toss each vegetable in olive oil, salt, pepper, thyme, and minced garlic.

Step 2: Assemble the Gratin

1. Grease a baking dish with olive oil.
2. Layer slices of sweet potato and beet, alternating colors for a visually appealing pattern.
3. Sprinkle small amounts of feta cheese between layers.
4. Continue layering until all vegetables are used.

Step 3: Bake

1. Cover with foil and bake for 35 minutes.
2. Remove foil and bake an additional 20–25 minutes until vegetables are tender and edges are slightly crisp.

Step 4: Add Toppings

1. Sprinkle chopped walnuts over the top.
2. Return to oven for 5–7 minutes to lightly toast walnuts.
3. Remove and let rest for 10 minutes before serving.
4. Garnish with parsley and optional honey or balsamic glaze.

Description

This gratin is a vibrant blend of roasted Mediterranean flavors. Beets bring earthy depth, sweet potatoes add natural sweetness, feta provides salty creaminess, and walnuts add crunch and richness. When baked together, the layers soften into a tender, flavorful dish with a beautiful balance of textures and colors.

Notes

• Slice vegetables evenly for consistent baking.
• Beets will stain—use gloves if desired.
• Feta adds saltiness, so adjust added salt accordingly.
• Resting time helps the layers set for easier slicing.

Tips

• Use a mandoline slicer for thin, even slices.
• Add rosemary or oregano for stronger Mediterranean flavor.
• Drizzle balsamic glaze for extra depth.
• Toast walnuts separately if you prefer more crunch.
• Serve warm, not piping hot, for best structure.

Servings

• Serves: 4–6

Nutritional Information (Approx. Per Serving)

Benefits

This dish is rich in fiber, vitamins, and healthy fats. Beets support blood flow and contain antioxidants like betalains. Sweet potatoes provide vitamin A for eye and immune health. Walnuts offer omega-3 fatty acids that support brain and heart health. Olive oil contributes healthy monounsaturated fats, while feta adds protein and calcium. Together, they create a balanced, plant-forward dish that is both nourishing and satisfying.

Q&A

Can I make this ahead of time?

Yes. Assemble it a day in advance and bake before serving.

Can I substitute feta?

Yes. Goat cheese or ricotta salata works well.

Can I make it vegan?

Yes. Replace feta with plant-based cheese or omit it entirely.

Do I need to peel the vegetables?

Peeling is recommended for smoother texture, especially for beets.

Can I add more vegetables?

Yes. Zucchini or carrots can be added to the layers.

How do I store leftovers?

Store in the fridge for up to 3 days. Reheat in the oven for best texture.

Can I freeze it?

Yes, but texture may soften slightly after thawing.

What can I serve it with?

It pairs well with grilled chicken, fish, or a simple green salad.