Heat a large skillet over medium heat. Add the ground beef and cook until browned, breaking it apart with a cooking spoon, about 5-7 minutes.
Drain excess fat if necessary and return the skillet to the heat. Add the diced onion, bell pepper, and minced garlic to the skillet. Sauté until the vegetables are tender, about 5 minutes.
Stir in the chili powder, cumin, salt, and pepper. Cook for another minute until the spices are fragrant.
Pour in the beef broth and add the frozen corn. Bring the mixture to a gentle simmer and cook for about 5 minutes, allowing the flavors to meld.
To serve, divide the cooked rice into four bowls. Spoon the ground beef mixture over the rice.
Top with fresh cilantro, sour cream, and shredded cheese if desired.
Feel free to customize your bowls with other toppings such as avocado, diced tomatoes, or jalapeños for an extra kick.