Onion Tart

Name: Onion Tart
Ingredients: '1/2 cup of butter'; '1 whole egg'; '1 teaspoon salt'; '1 1/2 cups all-purpose flour'; For the filling; '3 tablespoons unsalted butter'; '4 large onions, sliced'; '2 tablespoons grated Parmesan cheese'; '1 can of cream of mushroom soup'; 'to taste, salt'

1
'1/2 cup of butter'
2
'1 whole egg'
3
'1 teaspoon salt'
4
'1 1/2 cups all-purpose flour'
5
For the filling
6
'3 tablespoons unsalted butter'
7
'4 large onions, sliced'
8
'2 tablespoons grated Parmesan cheese'
9
'1 can of cream of mushroom soup'
10
'to taste, salt'

Ingredients

1
'1/2 cup of butter'
2
'1 whole egg'
3
'1 teaspoon salt'
4
'1 1/2 cups all-purpose flour'
5
For the filling
6
'3 tablespoons unsalted butter'
7
'4 large onions, sliced'
8
'2 tablespoons grated Parmesan cheese'
9
'1 can of cream of mushroom soup'
10
'to taste, salt'

Directions

1
Prepare the dough: In a bowl, mix together all ingredients to obtain a homogeneous mass
2
Spread and align at the bottom and sides of a 22 cm diameter tart mold
3
Bake in a moderate temperature oven (170°) for 15 minutes
4
Prepare the filling: In a skillet, melt the butter, add the onions and sauté them
5
Let it cool and add the cream of mushroom soup and salt
6
Place over the tart dough
7
Bake again in a moderate temperature oven (170°) until lightly browned.