Place the beef cubes in the bottom of the slow cooker.
Add the diced onion, bell peppers, corn, and minced chipotle peppers on top of the beef.
Pour in the fire-roasted tomatoes and beef broth.
Stir in the garlic, cumin, oregano, salt, and black pepper until everything is evenly combined.
Cover and cook on low for 8 hours until the beef is fork-tender.
Taste and adjust salt or pepper if needed, then ladle into bowls and top with chopped cilantro.