Preheat the oven to 375°F (190°C) and grease a 9x13 inch baking dish.
In a skillet over medium heat, cook the sausage until browned. Drain any excess grease.
Spread the biscuit pieces evenly in the prepared dish.
Top with cooked sausage and shredded cheese.
In a bowl, whisk together eggs, milk, salt, and pepper. Pour over the casserole.
Bake for 25-30 minutes, or until the eggs are set and the top is golden brown.
Let cool for a few minutes before serving.