Marinate and Grill the Chicken
In a bowl, mix olive oil, lime juice, smoked paprika, cumin, garlic powder, chili powder, salt, and pepper.
Coat the chicken evenly with the marinade. Let it marinate for at least 30 minutes (or up to overnight in the fridge).
Preheat your grill or grill pan to medium-high heat.
Grill the chicken for 6-8 minutes per side, or until the internal temperature reaches 165°F (74°C).
Allow the chicken to rest for 5 minutes, then slice it thinly.
Make the Street Corn Mix
In a dry skillet, char the corn kernels over medium-high heat for 3-4 minutes until slightly browned. (Skip this step if using grilled corn.)
In a bowl, combine charred corn, mayonnaise, cotija cheese, lime juice, chili powder, minced garlic (optional), and cilantro. Mix well.
Assemble the Bowls
Divide the cooked rice evenly into four bowls.
Top each bowl with sliced grilled chicken and a generous scoop of the street corn mix.
Add avocado slices, jalapeño slices (if using), and fresh cilantro leaves.
Drizzle with lime crema if desired and serve with lime wedges for extra zest.