Step 1: Preheat Oven : Preheat your oven to 350°F (175°C). Grease a 9x13-inch baking dish with butter or non-stick spray.

Step 2: Cook the Sausage :In a skillet over medium heat, cook sausage until browned and fully cooked (about 6–8 minutes). Drain excess fat and set aside.

Step 3: Prepare the Egg Mixture : In a large mixing bowl, whisk together eggs, milk, salt, pepper, garlic powder, and onion powder until smooth.

Step 4: Assemble the Casserole : Spread the bread cubes evenly in the prepared baking dish. Add the cooked sausage on top, followed by any optional vegetables. Sprinkle shredded cheese evenly. Pour the egg mixture over everything, pressing lightly with a spoon to ensure all the bread soaks up the liquid.

Step 5: Bake the Casserole : Cover with foil and bake for 30 minutes. Remove foil and bake for another 15–20 minutes, or until the center is set and the top is golden brown.

Step 6: Cool and Serve : Let the casserole cool for 5–10 minutes before slicing. Garnish with chopped green onions or herbs.