Directions

1. In a medium saucepan, boil the pasta until it reaches an al dente texture, then drain.
2. In a small skillet, sauté the onions and peppers in butter until slightly tender.
3. Grease the bottom and sides of an 11x15 baking dish. Add the spaghetti sauce directly into the baking dish and spread across the bottom of the pan.
4. Add the pasta, followed by the peppers and onions.
   
5. Top with the cheddar and Swiss cheese.
   
6. Bake in a 385-degree oven for approximately 20 minutes, stirring occasionally.
7. Top with the mozzarella cheese and return to the oven just long enough for the cheese to melt.