Shred Cheese (if not using pre-shredded)

Slice mushrooms and black olives (if not using pre-sliced)

Cook bacon (if not using pre-cooked) in frying pan. Place on plate with paper towel to absorb extra fat. Drain fat from frying pan. When cooled, roughly chop into bite-size pieces.

Cook the breakfast sausage (if not using-precooked) in frying pan. Place on plate with paper towel to absorb extra fat.

In the same pan over medium heat, add mushrooms. Add salt and pepper. Cook until some of the water is cooked out of them. Place on a plate with paper towel to absorb extra water.

Crack eggs into large bowl. Add salt, pepper, dry mustard, and Worcestershire sauce. Whisk with fork or whisk until thoroughly mixed.

Add Egg Mixture to Milk in a large glass measuring cup with a spout.

Butter casserole dish.

Layer Sliced Bread on the bottoms, cutting it to fit and completely cover the dish.

Add layer of Sausage, Bacon, Mushrooms and Black Olives. Top with Cheese.

Add another layer of bread. Add another layer of Sausage, Bacon, Mushrooms and Black Olives. Top with Cheese.

Add a final layer of bread. Use remaining Butter to butter the top of the Bread. Add a final layer of Sausage, Bacon, Mushrooms and Black Olives. Top with Cheese.

Pour Egg Mixture over top.