Heat the large pot over medium heat and add the ground beef. Cook, breaking it apart with a spoon, until browned and cooked through, about 5-7 minutes, until you hear a gentle sizzling and see the meat turn a rich brown.
Add the diced tomatoes, draining some juices if necessary, and stir well to combine with the beef. Let the mixture simmer briefly until fragrant, about 2 minutes, as the tomatoes release their aroma.
Stir in the black beans, corn, and taco seasoning, ensuring everything is evenly coated and distributed. Cook for another 2-3 minutes until heated through and aromatic.
Pour in the chicken broth, then increase the heat slightly to bring the mixture to a gentle boil. Once bubbling, reduce the heat to low, cover, and let it simmer for 15-20 minutes, allowing the flavors to meld and the soup to thicken slightly.
Uncover the soup and stir well to loosen anything sticking to the bottom. Check the seasoning and adjust with salt or more spices if needed. Once the soup is flavorful and heated evenly, ladle it into bowls.
Sprinkle shredded cheddar cheese on top of each bowl, allowing it to melt slightly from the hot soup. Crush a handful of tortilla chips and sprinkle over the cheese for added crunch and flavor.
Squeeze fresh lime juice over the bowls for a bright, tangy kick. Serve immediately, garnished with additional chips or chopped cilantro if desired, and enjoy the warm, vibrant flavors of this comforting taco soup.
