Rinse the rice until the water runs clear.
Cook rice in chicken broth for 18 minutes, then rest 5 minutes. Stir in lime juice, cilantro, and salt.
Sauté diced onion in olive oil in a large skillet.
Add minced garlic and cook briefly until fragrant.
Add ground beef and brown until cooked through. Drain excess fat.
Stir in cumin, chili powder, paprika, oregano, cayenne, salt, and pepper. Cook for 2 minutes.
Warm black beans with a pinch of cumin (optional).
Steam or microwave corn until hot.
Assemble the bowls with rice, beef, beans, corn, avocado, pico de gallo, cheese, and sour cream.
Garnish with lime wedges and hot sauce. Serve immediately.