Adapted from: http://allrecipes.com/recipe/quiche/detail.aspx
1 cup shredded cheddar cheese
3 teaspoons all-purpose flour
3/4 cup cooked crumbled breakfast sausage
1 green onion
1 cup milk
1/4 teaspoon salt
1/4 teaspoon ground dry mustard
1 (9 inch) unbaked deep dish pie crust
In medium bowl, toss 3 teaspoons flour with the grated cheese. Sprinkle 1/2 mixture into the pie shell. On top of cheese, sprinkle sausage, another layer of cheese and green onions. Then in another medium bowl, combine eggs, milk, and then add salt and mustard powder. Beat until smooth and pour over cheese and green onions.
Preheat oven to 400 degrees. Put foil around edge of crust to protect it. Bake in the preheated oven for 45 minutes, or until filling is set and crust is golden brown.