Preheat the oven to 375 F and lightly grease a baking dish.
Press the crescent roll dough into the bottom of the dish and seal the seams.
Bake the crust for 8 to 10 minutes until just set.
Whisk the eggs, milk, salt, pepper, and onion powder in a bowl.
Spread the cooked sausage over the crust, then add the bell pepper and half of the cheese.
Pour the egg mixture evenly over the top.
Finish with the remaining cheese and bake until the center is set and the top is golden.
Let it rest for 5 to 10 minutes before slicing.