01 - Heat a skillet over medium heat. Add the ground beef and cook until browned, breaking it apart as it cooks. Drain excess fat and transfer to the crockpot.
02 - In the same skillet, add diced onion, minced garlic, and bell pepper. Sauté for 2-3 minutes until softened. Transfer the vegetable 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 adjust seasonings if needed. Serve hot topped with shredded cheese, sour cream, cilantro, jalapeños, or tortilla chips as desired.