01 - Preheat oven to 375°F (190°C). Grease a 9×13 inch baking dish.
02 - Prepare the cornbread according to package directions. Let it cool slightly, then crumble into the prepared baking dish.
03 - In a large bowl, whisk together the eggs, milk or cream, salt, and pepper. Stir in half of the shredded cheese.
04 - Spread the cooked and crumbled sausage over the cornbread in the dish. Add diced bell peppers and onions if using.
05 - Pour the egg mixture evenly over the cornbread and sausage. Sprinkle the remaining shredded cheese over the top.
06 - Bake for 30-40 minutes, or until the casserole is golden brown and the eggs are set.
07 - Let the casserole rest for 10 minutes before slicing and serving. Garnish with fresh herbs if desired.