Season the chicken breast evenly with the cumin, smoked paprika, sea salt, and black pepper.
Heat the olive oil in a medium skillet over medium-high heat.
Add the chicken to the skillet and cook for 6 to 7 minutes per side until golden brown and the internal temperature reaches 165°F.
Remove the chicken from the skillet, let it rest for 5 minutes, and then slice into thin strips.
In the same skillet, add the sliced red bell peppers and onions, sautéing for 4 to 5 minutes until tender-crisp and slightly charred.
In a small saucepan or microwave, gently warm the pre-cooked brown rice and rinsed black beans.
Assemble the bowl by placing the rice and beans at the base, then top with the sautéed vegetables and sliced chicken.
Finish the bowl with fresh avocado slices, salsa, chopped cilantro, and a generous squeeze of lime juice.