1 lb lean ground beef
1 cup yellow onion, diced
1/2 cup real bacon bits
1/4 cup mayo
1/4 cup ketchup
1 tbsp mustard
1/2 tsp salt
1/2 tsp pepper
2 tsp onion powder
12 slices bread
1/2 cup margarine
4 cups shredded mozzarella and cheddar blend
Preheat oven to 400F.
Cook ground beef in a large frying pan over medium-high heat with a dab of butter or margarine.
Crumble ground beef well while it’s cooking.
Once the ground beef is cooked, drain excess grease from the pan.
Add the diced onions to the pan with the ground beef and stir well.
Continue cooking for a few minutes, stirring occasionally.
Remove the pan from the heat and add bacon bits, mayo, ketchup, mustard, salt, pepper and onion powder. Stir well.
Spread 6 of the slices of bread with 1/4 cup of the margarine and then cut them in half.
Lay the pieces of bread, margarine side down, in a greased 9 x 13 inch baking dish.
Sprinkle 2 cups of the cheese on top of the bread.
Spoon the meat mixture on top of the cheese and spread it out evenly.
Sprinkle the remaining 2 cups of cheese over the meat.
Spread 6 more slices of bread with 1/4 cup of margarine and cut them in half as well.
Lay the pieces of bread, margarine side up, on top of the casserole.