Pasta with Sausage, Pepper and Onions

This is one of Mike's favorite dishes.  I created it after seeing him order it time and again at various italian restaurants.  This is also an easy one and makes great leftover portions for lunch!

Ingredients:
2 italian sausages (turkey regular)
1 green pepper, chopped
1 large yellow onion, chopped
1 clove garlic, chopped, optional
crushed red pepper
1 jar pasta sauce
12-16 oz wheat penne pasta, cooked

Boil water and cook the pasta.  Cook sausage in large skillet over medium-high heat.  You can either take it out of the casing and brown or just saute the whole link and slice when almost cooked.  Add the peppers, onions and garlic.  Saute 2-3 minutes.  Add the pasta sauce and crushed red pepper and heat through.  When the pasta is ready, add to the skillet and toss together with the sauce.  Top with fresh grated parmesan cheese.