Egg & Sausage Breakfast Bake

Hello!  I'd like to share one of my favorite "make ahead" recipes for Christmas morning.  You can add any ingredient you like.  Simply put it together the night before & when you get up, before you open presents, put it in the oven.  It takes 45 minutes to bake and after only about 20 minutes you start to smell the aroma of breakfast, yum!  It's also nice to serve some sort of bread, try the blueberry streusel, it's very good and you can make it a couple of days ahead and freeze.  I defrost in the microwave for 2 minutes and it's ready to go!  Stress free and delicious breakfast, so easy.

1 lb. sausage, cooked and drained (any kind you like, you could also use cooked and crumbled bacon or no meat at all)
Vegetables-any you like, cook them first, otherwise there would be too much moisture.  Mushrooms, onions, peppers, tomatoes, any one or all of these would be great!
1 1/2 cups shredded cheddar cheese
1 1/2 cups milk
6 slices of whole wheat bread, cubed
2 teaspoons dried mustard
6 eggs, beaten

Evenly coat a large casserole dish or a 9 x 13" pan with cooking spray.  Add cubed bread.  Cook and drain sausage, add evenly over bread.  (if you want to add any vegetables, cook and add them now) Beat the rest of the  ingredients in a mixing bowl and pour over bread and sausage.  Cover and chill overnight.  Place in cold oven and set temperature to 350', bake for 45 minutes.  Serve immediately.