Slow Cooker Sausage, Peppers, & Onions

***Susan's Note: I made this in the crock pot today with sweet turkey sausage instead of the "hot Italian sausage" that's listed - yum! I used red and orange peppers, potato rolls and topped with shredded mozzarella.

4-5 lbs hot italian sausages
1 jar (26 oz) spaghetti sauce (I used Francesco Rinaldi Tomato Basil)
1 large onion, sliced thin (Vidalia preferred)
1 green bell pepper, cored, seeded, sliced
1 red bell pepper, cored, seeded, sliced
1/2 cup packed dark brown sugar (I used light)
Rolls, split open
Provolone cheese, sliced (optional)

1. Combine ingredients (not rolls and cheese) in CrockPot. Cook on Low 8-10 hours or HIGH 4 to 6 hours.

2. Place mixture on rolls, top with cheese if desired.