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Root Vegetable Gratin with Crispy Oat Topping
A classic French gratin reinvented with potatoes, beets, and fennel, topped with a golden oat crust. Served with a Dijon mustard and button mushroom sauce.
55 min4 servings420 kcalDifficulty: Medium
Ingredients
- 500 g Potatoes
- 250 g Beet
- 200 g Fennel
- 100 g Oat flakes
- 200 ml Sour cream
- 200 g Button mushrooms
- 2 tbsp Dijon mustard
- 50 g Butter
- 80 g Grated cheese
- 2 clove Garlic
- 2 sprig Fresh thyme
- 1 tsp Salt
- 1 pinch White pepper
Instructions
Step 1
Preheat the oven to 200°C.
Step 2
Thinly slice potatoes, beet, and fennel using a mandoline.
Step 3
Clean and slice the mushrooms, sauté them in a pan for 5 minutes.
Step 4
Mix sour cream, mustard, pressed garlic, and thyme in a bowl.
Step 5
Butter a baking dish and layer the vegetables alternately.
Step 6
Pour the cream sauce over the vegetables.
Step 7
Mix oat flakes, cheese, and softened butter, then spread over the top.
Step 8
Bake for 35 minutes until golden brown.