Set oven control to broil. Toss potatoes, onion, bell peppers, carrot, zucchini, mushrooms, garlic and oil. Spread vegetable mixture, skin sides up, in ungreased jelly roll pan, 15 1/2 x10 1/2 x1 inch.
Broil with tops 4 to 6 inches from heat 10 to 15 minutes or until roasted. Remove vegetables as they become soft; cool. Remove skins from peppers. Coarsely chop potatoes, onion and peppers.
Mix vegetables, broth, tomatoes and pasta in 4-quart Dutch oven. Heat to boiling; reduce heat to low. Cover and simmer about 15 minutes, stirring occasionally, until pasta is tender. Sprinkle with parsley and pepper.