01 - Heat a skillet over medium heat and add the ground beef. Cook, breaking it apart with a spoon, until no longer pink. Drain excess fat and set aside.
02 - Add diced onion, minced garlic, and bell pepper to the skillet with the beef. Sauté for 2-3 minutes until vegetables begin to soften. Transfer the entire mixture to the crockpot.
03 - Add corn, diced tomatoes with juices, green chilies, black beans, and kidney beans to the crockpot. Pour in the beef broth.
04 - Sprinkle taco seasoning, ground cumin, black pepper, and salt over all ingredients. Stir thoroughly to distribute seasonings evenly.
05 - Cover and cook on Low setting for 6-7 hours or on High setting for 3-4 hours until flavors have melded together.
06 - Taste the soup and add more salt, pepper, or cumin as needed to suit your preference.
07 - Ladle hot soup into bowls and serve immediately topped with shredded cheese, sour cream, cilantro, jalapeños, or tortilla chips as desired.