1/2 loaf white bread (I used leftover homemade white bread)
1 pound sage-flavored pork sausage
1/2 onion, chopped
10 ounces shredded sharp Cheddar cheese
2 cups half-and-half
1 teaspoon dry mustard
1 teaspoon salt
5 large eggs, slightly beaten

Cut the bread into 1/2-inch pieces, and layer them in a greased 9 x 13-inch baking dish.

In a medium skillet, cook the sausage and chopped onion until the sausage is no longer pink. Drain the fat from the sausage, and place the meat over the bread cubes in the pan. Sprinkle the Cheddar cheese over the meat.

In a separate bowl, mix together the half-and-half, dry mustard, salt and the eggs. Mix until combined. Pour the mixture over the cheese. Cover the casserole with foil, and refrigerate at least 8 hours or overnight.

The next day, preheat the oven to 350 degrees Fahrenheit. Bake the covered casserole for 50 minutes, or until set and slightly golden. Remove from the oven, and allow the casserole to set for approximately 15 minutes before serving.