In a large skillet, heat oil and add onion, saute for about 2 minutes. Add pepper and crumbled sausage patty and saute 2 more minutes. Add cooked squash, salt and oregano and heat about 2 minutes longer, until all flavors are mixed through and it is hot.
Serve as is with some fruit on the side for a complete breakfast. If you feel you need more protein a poached or fried egg would go well or some added cheese.