Lightly grease a 10-inch pie plate Sprinkle bacon cheese and onion in pie plate
Beat milk Bisquick eggs salt and pepper in a medium size bowl with electric mixer until smooth about 1 minute
Pour into pie plate Bake in hot oven 400 for 35 minutes or until golden brown and knife inserted halfway between center and edges comes out clean Garnish with tomato slices and bacon strips if you wish Refrigerate remaining quiche