Preheat oven to 350 degrees F.
In a skillet, cook beef until browned and crumbled. Drain grease. Add oats to beef and stir well to incorporate.
Add spaghetti sauce, cottage cheese, and rigatoni to the beef and mix well. In an 11x7 casserole dish, add your rigatoni mixture and top with mozzarella and romano cheeses.
Bake or 20-30 minutes or until hot and cheese is melted.