Spaghetti with Italian Sausage

2 lbs. Italian sausage (sweet, hot or mild)
1 (48 oz.) jar spaghetti sauce
1 (6 oz.) can tomato sauce
1 c. water
Green pepper, sliced thin
1 tsp. parsley flakes
1 Tbsp. Parmesan cheese
1 large onion, sliced thin

Place sausage in skillet and cover with water. Simmer 10 minutes; drain. Meanwhile place remaining ingredients in slow cooker. Add drained sausage and cover; cook on low four hours. Increase to high and cook one hour more. Cut sausage in bite-size pieces and serve over cooked spaghetti. Sprinkle with Parmesan as needed.