2 tablespoons butter
3 large onions, thinly sliced
1 teaspoon sugar
1 prebaked pie crust
4 eggs
1 cup milk
1/4 cup chopped parsley
1/8 cup chopped chives
2 tablespoons grainy Dijon mustard
2 ounces camembert, diced
1 cup shredded mozzarella
Salt and pepper
Preheat the oven to 350 degrees.
Heat the butter in a skillet and add the onions and sugar.
Cook over low heat, stirring occasionally, until the onions are deeply browned and caramelized, about 20 to 25 minutes. Set aside to cool.
Place the prebaked pie crust into a pie pan and spread the onions over the bottom.
Whisk together the eggs, milk, herbs and mustard until smooth. Mix in the camembert and pour over the onions.
Top with the shredded cheese and bake for about 45 minutes, or until the cheese on top is bubbly and brown and the center is just set.
Set aside for 15 minutes to cool before serving.
Pro tip: Use a tart shell instead of a pie crust.