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Tarte à l'oignon

French Onion Pie Recipe

Prep Time:20 minutes
Cook Time:50 minutes
Total Time:1 hour 10 minutes
Course: Main course
Cuisine: French
Servings: 4 servings

Ingredients

for the pie dough

  • 250 g flour
  • 125 g butter
  • 1 egg
  • 1 tablespoon water
  • salt

FOR THE FILLING

  • 800 g onions
  • 30 g butter
  • 5 to 10 cl white wine
  • 2 eggs
  • 10 cl liquid cream
  • Grated nutmeg
  • salt and pepper
  • 1 teaspoon brown sugar

Instructions

for the pie dough

  • Using the blade of your food processor, mix the flour with the salt and the soft butter cut into small cubes. You can also do this by hand.
    When the butter is incorporated into the flour, add the egg and water.
    Knead until a ball of dough forms.
    Strain and chill for 30 minutes. Meanwhile, prepare the filling.

FOR THE FILLING

  • Heat the butter in a pan.
    Add the finely chopped onions and cook for about 20 to 30 minutes, stirring regularly. You can add the white wine after 5 minutes of cooking and the spoonful of brown sugar. They should become translucent.
    Add salt, pepper and nutmeg.
    In the meantime, mix the eggs with the liquid cream and the milk, add salt and pepper.
    Preheat the oven to 180°C.
    When ready to garnish, roll out the dough on a floured work surface.
    Spread the onions on the bottom of the pie and pour the egg mixture.
    Bake at 180°C for about 35 to 40 minutes.