Add diced onion, peeled and chopped carrots, and sliced and quartered zucchini. Cook for 4-5 minutes, until the vegetables begin to soften.
Stir in frozen beef meatballs, diced tomatoes with green chiles, tomato sauce, beef broth, drained and rinsed black beans, frozen corn, salt, pepper, chili powder, and cumin.
Bring the pot to a boil then reduce the heat to medium and simmer uncovered for 15-20 minutes until the meatballs are cooked through and the veggies are the tenderness that you prefer.
Add in the zucchini and then simmer for an additional 5 minutes.