Cheese Strata

12 slices of white bread, cut holes with water glass
16 slices of american cheese
2 C diced ham
6 eggs
3 1/2 C milk
1 T instant onion flakes

-Put the circles of bread aside, tear the remaining bread pieces and put on bottom of greased pan
-Sprinkle onion flakes over the bread
-Layer the diced ham, then the slices of cheese
-Put the circles of bread on top
-Combine eggs and milk and pour on top of casserole 
-Cover and put in fridge over night
-The next morning cook it uncovered at 325 degrees for 55 minutes. Let it stand 10 minutes before serving