Step #1 Prepare this casserole dish the night before.
Step #2 In a 9 inch x 13 inch oven-proof casserole dish, place 8 slices of bread to cover bottom of dish.
Step #3 Place 8 slices of Italian sausage or more if required to cover the bread.
Step #4 Now place 8 slices of cheese (about 1/8 inch thickness) over the sausage.
Step #5 Cover up with another layer of 8 slices of bread.
Step #6 Then layer over with more Italian sausage to cover the bread.
Step #7 Layer the top this with slices of cheese.
Step #8 In a mixing bowl, onion, mustard, pepper, beat eggs, green & red peppers, add salt, Worcestershire sauce, Tabasco sauce & milk; mix well to mix.
Step #9 Pour mixture over the prepared casserole.
Step #10 Cover up with plastic wrap & put in the fridge overnight.
Step #11 Next morning, preheat your trusty oven to 350°F.
Step #12 Remove casserole from refrigerator, remove the plastic wrap & discard.
Step #13 Melt butter & spoon over the top of the casserole.
Step #14 Cover up the top this with crushed cereal crumbs.
Step #15 Bake uncovered in preheated 350 F oven for 60 mins.
Step #16 Remove from oven & let rest for 10 mins before cutting & serving.
Step #17 You may also use back bacon or sliced ham instead of Italian sausage.
Enjoy the Breakfast Casserole Ala Villani Style recipe