Heat oil in large pot or Dutch oven over medium heat. Add onion, red and green peppers, and jalapeno; saute for 5 minutes. Add zucchini and cook until onions are translucent and softened, about 4 minutes. Add chili powder, cumin, salt and pepper. Stir in tomatoes, black beans, corn and vegetable broth; simmer for 20 to 25 minutes or until reduced and thickened.
Wrap tortillas in damp paper toweling. Microwave on 100 percent power 1 to 2 minutes or until steaming and very pliable. Spread 1/2 cup filling over a tortilla a roll up. Repeat with remaining filling and tortillas.