Preheat the Oven: Start by preheating your oven to 375°F (190°C).
Whisk the Eggs: In a large mixing bowl, whisk together the eggs, milk, salt, and pepper until everything is combined and fluffy.
Mix in the Goodies: Stir in the shredded cheese, cooked sausage (if using), diced bell peppers, and onions until evenly distributed.
Prepare the Biscuits: In a greased baking dish, cut the biscuits into quarters and spread them evenly across the bottom.
Combine and Bake: Pour the egg mixture over the biscuits, making sure it’s evenly distributed. Bake for 30-35 minutes or until the egg is completely set and the top is golden brown.
Cool and Serve: Allow to cool for a few minutes. Slice and serve warm!