3 eggs,
1 cup milk or half and half
1 tablespoon flour
1 pinch cayenne pepper
3/4 teaspoon salt
1/8 teaspoon black pepper

350° 30 – 35 minutes

Anything will do. Quiche is great for using leftovers. Here are some suggestions.
~1 zucchini, medium sliced. Fry until brown on both sides.
~1 onion, small, thin sliced, sauteed until soft.
~1/2 cup shredded cheese, any cheese but hard cheeses like Parmesan, etc
~2 tablespoons sliced black olives
~1 tablespoon crumpled bacon
~1 sausage, sliced thin and cooked

Add fillings to crust. Pour custard over fillings. Place a cookie sheet under pie to catch overflow.
Bake until knife inserted in center comes out clean.
Let stand 10 minutes before cutting.