Prepare the white rice according to package instructions until tender and fluffy.
Dice the chicken breast into small cubes and season evenly with cumin, chili powder, sea salt, and black pepper.
Heat the olive oil in a large skillet over medium-high heat.
Add the chicken to the skillet and sauté until golden and cooked through, approximately 5 to 7 minutes.
Toss in the diced red onion, bell pepper, and minced garlic, cooking until the vegetables are slightly softened.
Add the corn kernels and black beans to the pan, stirring for 2 minutes to heat them through.
Divide the cooked rice into a serving bowl and top with the chicken and vegetable mixture.
Garnish with fresh avocado slices and a bright squeeze of lime juice before serving.