Add the black beans, corn, diced tomatoes with green chilies, onion, red bell pepper, and garlic to the slow cooker.
Pour in the vegetable broth, then stir in the cumin, chili powder, salt, and black pepper.
Cover and cook on low for 6 to 7 hours until the vegetables are soft and the flavors have blended.
Taste and adjust salt or pepper if needed.
Ladle into bowls and top each serving with fresh cilantro and a squeeze of lime.