Heat olive oil in a large pot over medium-high heat. Add bell peppers, onion, and carrots and saute 3 minutes.
Step 2
Add garlic and saute 2 minutes longer. Stir in tomatoes, tomato sauce, broth, chili powder, cumin, coriander, cayenne pepper, and season with salt and pepper to taste.
Step 3
Bring mixture to a light boil then reduce heat to medium-low, cover and simmer 10 minutes.
Step 4
Stir in zucchini, simmer 10 minutes longer. Stir in corn, kidney beans and black beans and heat through, about 2 minutes longer.
Step 5
Thin with more broth, up to 1 cup as desired. Serve warm with toppings of your choice.