Ham and Spinach Quiche With Five Cheeses

Ingredients

• ["2 (9 inch) pie crusts", "1 cup chopped ham", "1 (16 ounce) package frozen chopped spinach", "1 small onion, minced", "6 eggs", "1 12 cups milk", "12 cup cottage cheese", "1 12 cups shredded sharp cheddar cheese", "1 12 cups shredded mozzarella cheese", "12 cup shredded parmesan cheese", "6 slices swiss cheese", "4 tablespoons flour", "1 teaspoon garlic salt (or \"to taste\"")""