Grease a 9x13-inch casserole dish. Place the bread as a "liner" in the bottom of the dish. Next, sprinkle cheese and sausage evenly over the bread. Mix together the eggs, milk, salt, dry mustard, peppers, and pour this mixture over the bread, sausage, and cheese. Cover and chill overnight. Remove from the refrigerator 30 minutes before cooking. Bake at 350 degrees F. for 30-35 minutes. Keep warm in a 250 degrees F. if needed.