Heat olive oil in a large heavy-bottomed skillet over medium-high heat until shimmering.
Add diced onions and sauté for 4 minutes until translucent.
Add ground beef to the skillet and cook for 6-8 minutes, breaking the meat into small crumbles until no pink remains.
Stir in minced garlic, chili powder, cumin, smoked paprika, salt, and black pepper; cook for 90 seconds until fragrant.
In a separate mixing bowl, combine the warm cooked rice with lime juice and minced cilantro, tossing until evenly incorporated.
Heat the black beans and corn in a small saucepan over medium heat for 3 minutes or until reached internal temperature of 165°F.
Divide the cilantro-lime rice equally among four serving bowls.
Layer the seasoned beef, black beans, and corn over the rice.
Top each bowl with shredded lettuce, diced tomatoes, avocado slices, and shredded cheese immediately before serving.