Description

This Rustic Roasted Root Vegetable Gratin is a stunning, nutrient-rich casserole featuring layers of sweet potatoes, potatoes, beets, zucchini, and aromatic herbs baked until tender and golden. Finished with creamy goat cheese or feta and fresh rosemary, this elegant dish combines comfort food with wholesome ingredients, making it perfect for family dinners, holiday gatherings, Thanksgiving menus, Christmas feasts, and healthy meal-prep plans.

The colorful layers create a visually impressive presentation while delivering a delicious balance of earthy, sweet, savory, and herbaceous flavors. Rich in vitamins, minerals, antioxidants, and fiber, this vegetable gratin is a healthier alternative to traditional potato casseroles while still providing a satisfying and comforting dining experience.

Recipe Information

Prep Time: 25 minutes

Cook Time: 60 minutes

Total Time: 1 hour 25 minutes

Servings: 6–8

Cuisine: Mediterranean / French-Inspired

Difficulty: Easy to Intermediate

Ingredients

For the Vegetable Gratin

• 2 medium sweet potatoes, thinly sliced
• 2 medium Yukon Gold potatoes, thinly sliced
• 2 medium beets, thinly sliced
• 2 zucchini, thinly sliced
• 1 large onion, thinly sliced
• 3 cloves garlic, minced
• 2 tbsp fresh rosemary, chopped
• 1 tbsp fresh thyme leaves
• 2 tbsp fresh parsley, chopped
• 150g goat cheese or feta cheese, crumbled
• 3 tbsp olive oil
• Salt and black pepper to taste

Optional Cream Sauce

• 1 cup heavy cream
• ½ cup grated Parmesan cheese
• 1 tsp Dijon mustard
• Pinch of nutmeg

Instructions

Step 1: Prepare the Vegetables

1. Wash and peel the sweet potatoes and beets.
2. Slice all vegetables into thin, even rounds using a sharp knife or mandoline slicer.
3. Pat dry with paper towels to remove excess moisture.

Step 2: Prepare the Baking Dish

1. Preheat oven to 375°F (190°C).
2. Lightly grease a large casserole dish with olive oil.
3. Scatter sliced onions and garlic across the bottom.

Step 3: Make the Cream Mixture (Optional)

1. In a bowl, whisk together cream, Parmesan cheese, Dijon mustard, and nutmeg.
2. Season lightly with salt and pepper.

Step 4: Assemble the Gratin

1. Arrange vegetables vertically in alternating rows:
   • Sweet potato
   • Potato
   • Beet
   • Zucchini
2. Continue until the dish is completely filled.
3. Drizzle olive oil over the vegetables.
4. Pour cream mixture evenly if using.
5. Sprinkle rosemary, thyme, parsley, salt, and pepper.

Step 5: Bake

1. Cover with foil.
2. Bake for 40 minutes.
3. Remove foil and bake an additional 20 minutes.
4. Sprinkle goat cheese or feta over the top.
5. Bake another 5 minutes until lightly golden.

Step 6: Serve

1. Let rest for 10 minutes.
2. Garnish with fresh rosemary sprigs.
3. Serve warm as a main dish or side dish.