Breakfast Tater Tot Casserole

My Mom made this casserole when we had a brunch at her house a few weeks ago. It was delicious. It would be great on Christmas morning because you make it the night before. I think it would be good with some chopped green pepper added also.

Breakfast Casserole

1 pkg. tater tots (small)
8 eggs
2 cups half and half or evaporated milk
1 lb. bulk sausage
2 cups grated cheddar cheese
1 tsp. dry mustard
1 tsp. salt
1/4 c. chopped onion, optional

Place a layer of tater tots in the bottom or a large cake pan or casserole dish. Brown and crumble sausage, drain. Mix together eggs, milk, mustard and salt, beat well. Add sausage to egg mixture and pour over tater tots. Sprinkle cheddar cheese on top. Let casserole refrigerate overnight. Bake in the morning at 350 degrees for 45 minutes.