Sausage and Egg Casserole

Put this together yesterday and baked it this morning - I thought it turned out good. I combined to recipe and created my own! Definitely make again!

INGREDIENTS
1 pound ground pork sausage
1 teaspoon mustard powder (I didn't have any so I used just regular mustard)
1/2 teaspoon salt
6 eggs, beaten
1 cup milk
6 slices white bread, toasted and cut into cubes (opps I didn't read the recipe right hadn't toasted still turned out good)
8 ounces mild Cheddar cheese, shredded ( I probably used a little less)
green onion
mushrooms
1 (10.75 ounce) can condensed cream of mushroom soup, undiluted

Crumble sausage into a medium skillet. Cook over medium heat until evenly brown; drain.
In a medium bowl, mix together mustard powder, salt, eggs and milk. Add the sausage, bread cubes, and cheese, and stir to coat evenly. Pour into a greased 9x13 inch baking dish. Cover, and chill in the refrigerator for 8 hours, or overnight.
Preheat oven to 350 degrees F (175 degrees C).
Bake 45 to 60 minutes until set.