This Croissant Breakfast Casserole has become a staple morning meal in our house. And here’s why: it's a one-stop shop meal, ready in 1 hour, and it feeds a crowd!
Heat a large skillet to medium high heat. Add sausage and cook until browned, breaking the sausage up throughout the cooking process. Remove sausage from the pan and place on the bottom of a 13″x9″ baking dish.
To the same hot skillet add butter & onions. Cook until onions are caramelized, about 5 minutes. Layer the onions over the sausage, spreading out evenly in the dish.
Cover the baking dish with tinfoil and bake for 30 minutes. Remove the tinfoil and bake for an additional 5 -10 minutes. You want the inside mostly firm when you give the pan a quick jiggle test.