Sausage and Bean Dinner

1 Ib turkey sausage, cut 1/4 inch thick slices
1 Large green bell pepper, chopped
1 medium onion, chopped
1 Tbsp vegetable oil
2 14 oz cans stewed tomatoes
15 oz can kidney beans, drained
15 oz can pinto beans, drained
15 oz can Great Northern beans, drained
1/2 tsp garlic powder
16 oz pkg rotini pasta

In a large Dutch oven, brown sausage over medium high heat.  Remove sausage; set aside.  Discard drippings.  Cook pepper and onion in vegetable oil over medium heat until tender.  Add sausage, tomatoes, beans and garlic powder, bring to a boil, reduce heat and simmer 30 minutes.  Cook pasta according to package directions.  Serve sausage mixture over pasta.