While the sausages are cooking (about 10 minutes), chop your garlic, onion, and peppers.
Cook for 3-5 more minutes or until the sausages are warm. Cut the rolls almost in half, but not fully. You want the sauce to be able to settle at the bottom of the bun.
To serve, add 1 sausage to each bun. Spoon the onions, peppers, and tomato mixture over the sausage. Add some Parmesan cheese and/or parsley if you prefer.
If you have an outdoor grill, you can alter this recipe to grill the sausages and add to the pan at the end. This recipe can also be used over pasta, just chop up the sausage into bit sized pieces. This is a pretty messy meal so be sure to have plenty of napkins on hand. Enjoy!