Rustic Root Vegetable Gratin (Serves 4–6)
🥕 Vegetables (flexible)
2 medium golden potatoes
1 medium sweet potato or butternut squash
1 medium red beet
1 small yellow beet (optional, but pretty!)
1 small onion or 2 shallots
Slice everything thin and evenly (â…› inch / ~3 mm). A mandoline helps a lot.
🧄 Creamy Herb Sauce
1½ cups heavy cream
2 cloves garlic, finely minced
1 tsp fresh thyme, chopped (or ½ tsp dried)
½ tsp rosemary, finely chopped
½ tsp salt
½ tsp black pepper
Pinch of nutmeg (small but magic)
🧀 Cheese Layer
¾ cup grated Gruyère or Comté
½ cup Parmesan, finely grated
🌿 Topping
1 tbsp olive oil or melted butter
1 tbsp fresh parsley or thyme, chopped
Optional: flaky salt
🔪 Prep
Preheat oven to 375°F / 190°C
Butter or oil a shallow gratin dish or baking dish
Slice all vegetables thinly and evenly
Keep beets separate until layering (they bleed color)
🥄 Make the Cream Sauce
In a small saucepan, gently heat cream, garlic, herbs, salt, pepper, and nutmeg
Warm until just steaming — do not boil
Remove from heat and let steep 5 minutes
🧱 Assemble the Gratin
Pour a thin layer of cream sauce into the dish
Arrange vegetables in overlapping rows or circles, alternating colors
Sprinkle lightly with cheese between layers
Pour remaining cream evenly over the top
Finish with remaining cheese + drizzle of olive oil
🔥 Bake
Cover with foil and bake 40 minutes
Remove foil and bake 25–30 more minutes, until:
Top is golden and bubbly
Knife slides in easily
Optional: Broil 2–3 minutes for extra browning
🕰 Rest & Serve
Let rest 10–15 minutes (important for setting)
Finish with fresh herbs + flaky salt
Serve warm
✨ Pro Tips
Want deeper flavor? Add a layer of caramelized onions
Want crunch? Sprinkle breadcrumbs + Parmesan before final bake
Dairy-free? Use full-fat coconut milk + nutritional yeast

