Preheat oven to 350 degrees F; spray a 12-cup muffin tin with nonstick cooking spray and set aside.
Brown crumbled sausage in a large skillet over medium-high heat for approximately 10 minutes; when finished, remove from pan and drain; set aside
Use a biscut cutter, or the top of a small drinking class to punch holes in sandwich bread; lightly butter each piece of bread and place in the bottom of muffin tin.
Mix eggs and milk together.
Fill each muffin cup halfway with sausage pieces; fill with egg mixture 3/4 full.
Sprinkle cheese on top of each muffin cup and bake for 20 minutes or until eggs are set and slightly browned.