5 ounces 5 ounces turkey breakfast sausage, (4 small links), casings removed 1 teaspoon canola oil 1 onion, chopped Buy chicken sausage or make your own homemade chicken sausage or pork sausage. This particular combination of pork sausage, eggs, cheese, and cubed bread is a classic blend of flavors that just gets better as it rests. Chicken Sausage â feel free to use pork sausage, my family certainly prefers that. Cheddar cheese â Use your favorite cheese. Or spice it up with hot sausage, chorizo or andouille sausage. An overnight breakfast casserole that you can assemble in advance, leave to sit in the fridge, and just bake off in the morning is the key to a stress-free Christmas morning or a slow and relaxing Sunday brunch. Substitutions For Healthy Sausage Egg Casserole. Sausage and Egg Breakfast Casserole.