In a bowl, mix together flour, salt and butter cubes. Use your hands to squeeze the butter and knead it with the flour.
Add one egg and water, combine everything well with the spoon and knead a bit more with your hands.
Shape the dough for the quiche, again using your hands. You need a baking pan that is typically used for quiche, tart, American pie.
After you placed the dough in the pan, leave it in the freezer for at least 30 minutes.
Beat the eggs, add milk, pepper, salt, cream cheese and combine well.
Pour the mixture over the crust. Put the chopped mushrooms and broccoli, add slices of prosciutto and cheese.
Bake for 50 min at 175 degrees Celsius.