Step 1

Cook sausage links in a 12-inch nonstick skillet over medium heat for 5 to 8 minutes or until browned, turning frequently. Reduce heat to medium-low. Cover and cook for about 10 minutes more or until juices run clear. Transfer the sausage links to a cutting board. Thinly bias slice the sausage links; set aside.

Step 2

Add olive oil to the same skillet. Increase heat to medium. Add garlic and cook for 30 seconds. Add bell peppers and onion; cook for about 5 minutes or until crisp-tender, stirring occasionally.

Step 3

Add the sausage slices, undrained tomatoes, Italian seasoning, and, if desired, crushed red pepper to the skillet. Bring to boiling; reduce heat. Simmer, uncovered, for 5 minutes. To serve, sprinkle with Parmesan.