01 - Heat a skillet over medium heat. Add ground beef and cook until browned, breaking it apart with a spoon. Drain excess fat.
02 - Add diced onion, garlic, and bell pepper to the skillet. Sauté for 2-3 minutes until vegetables begin to soften. Transfer mixture to the crockpot.
03 - Add corn, diced tomatoes with juices, green chilies, black beans, and kidney beans to the crockpot. Pour in beef broth and stir to combine.
04 - Sprinkle taco seasoning, cumin, black pepper, and salt over all ingredients. Stir thoroughly to distribute seasonings evenly.
05 - Cover and cook on Low for 6-7 hours or on High for 3-4 hours until flavors have melded and vegetables are tender.
06 - Taste the soup and add additional salt, pepper, or cumin if desired.
07 - Ladle hot soup into bowls and serve with your choice of toppings: shredded cheese, sour cream, cilantro, jalapeños, or tortilla chips.