1. Preheat the Oven
Start by preheating your oven to 350°F (175°C). This will ensure your casserole bakes evenly, with the right amount of heat from the start. While the oven is preheating, grease a 9×13-inch baking dish with butter or cooking spray to prevent sticking.
2. Cook the Sausage
Next, grab a large skillet and set it over medium heat. Add the breakfast sausage and cook it until it’s browned and crumbled, breaking it up as it cooks. Make sure it’s thoroughly cooked, as this will enhance the flavor of the casserole. Once done, drain off any excess grease to avoid making the casserole too oily.
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