Calling this a quiche is really stretching the definition, but it's close enough.
1 cup milk
3/4 cup Bisquick baking mix
2 cups grated cheese
1/2 Tablespoon olive oil or cooking spray
Your choice of fillings
Preheat oven to 350 degrees.
Beat eggs thoroughly and add milk. Add Bisquick, beat with wire whisk.
In a ceramic or glass dish apply olive oil to entire dish and fill with cheese. Add selected toppings to top of cheese, then pour egg mixture on top.
Bake for 45-50 minutes.
--Adapted from Healdsburg Inn on the Plaza Bed and Breakfast