Ina Garten Overnight Breakfast Casserole is made with white bread, Colby jack cheese, pork sausage, onion, red bell pepper, diced green chiles, eggs, milk, and a blend of spices. This easy Overnight Breakfast Casserole recipe creates a hearty breakfast that takes about 8 hours and 30 minutes to prepare, including overnight chilling, and can serve up to 8 people.