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

