Heat a skillet over medium heat and add the ground beef. Cook until browned, breaking it up with a spoon as it cooks. Drain excess fat.
Add the diced onion, red bell pepper, green bell pepper, and garlic to the skillet. Cook for 3 minutes until the vegetables start to soften.
Transfer the beef and vegetable mixture to the slow cooker. Stir in the frozen corn, black beans, diced tomatoes with green chilies, beef broth, chili powder, cumin, salt, and black pepper.
Cover and cook on low for 6 hours or on high for 3 hours.
Taste and adjust salt if needed. Serve hot with fresh cilantro and shredded cheddar cheese on top.