Place beef, bell peppers, and onion into a Dutch oven over medium heat. Cook and stir until beef is browned and crumbly, 5 to 7 minutes. Add garlic and cook for 1 minute. Add diced tomatoes with chiles, black beans, corn, chicken broth, rice, sazon, and taco seasoning. Mix into beef.

Cover and cook over medium-low heat until rice is cooked through and tender, 20 to 25 minutes.