1 (8-9 inch) pastry shell, partially baked until light brown (Pillsbury all-ready pie crust works perfectly)
1 (16 oz.) container ricotta cheese
3 eggs, beaten
1/4 c. melted butter
1 c. shredded Cheddar cheese
1/4 c. Parmesan cheese
1 (10 oz.) pkg. frozen chopped spinach, thawed & thoroughly drained (use only half of the spinach)
3 tbsp. flour
Salt & pepper to taste

Combine all filling ingredients; mix well. Place in partially baked pastry shell. Bake at 350 degrees for 40-45 minutes or until filling is done. (Cover crust with aluminum foil if it starts getting too brown.)