Brown ground beef with bell pepper and onion in large nonstick skillet over medium heat 6 minutes or until beef is not pink, breaking beef up into 3/4-inch crumbles. Pour off drippings.
Stir in broth, pasta, barbecue sauce and 1/4 cup water; bring to a boil. Reduce heat to medium-low; cover and simmer 10 to 15 minutes or until pasta is almost tender. Uncover; cook 5 to 7 minutes or until pasta is tender and sauce is thickened, stirring occasionally. Sprinkle with cheese.