Creating the Quick & Easy Crescent Roll Breakfast Casserole is straightforward if you follow these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C) and grease a 9×13 inch baking dish.
2. Prepare Dough: Unroll the crescent roll dough and press it into the bottom of the prepared baking dish, making sure to seal the seams.
3. Cook Meat: In a skillet over medium heat, cook the bacon or sausage until crispy. Drain excess fat and set aside.
4. Mix Eggs: In a large bowl, whisk together the eggs, milk, salt, and pepper until well combined.
5. Add Fillings: Stir in the cooked meat, cheese, and any optional vegetables like bell peppers or onions into the egg mixture.
6. Pour Mixture: Pour the egg mixture evenly over the crescent roll dough in the baking dish.
7. Bake: Place the dish in the preheated oven and bake for 25-30 minutes, or until the egg is set and the top is golden brown.
8. Cool: Remove from the oven and let it cool for a few minutes before slicing.
9. Serve: Cut into squares and serve warm.

These simple steps will guide you through creating a breakfast casserole that is both delicious and easy to prepare.