Season the chicken breast evenly with chili powder, ground cumin, garlic powder, sea salt, and black pepper.
Heat the olive oil in a skillet over medium-high heat and cook the chicken until golden brown and cooked through, approximately 6 minutes per side.
Remove the chicken from the pan to rest, then in the same skillet, lightly sauté the cauliflower rice for 3-4 minutes until tender.
Warm the black beans in a small saucepan over low heat until heated through.
Slice the rested chicken breast into thin strips or bite-sized cubes.
Assemble the bowl by placing the romaine lettuce at the bottom, followed by the sautéed cauliflower rice and black beans.
Top the bowl with the sliced chicken, avocado, pico de gallo, and fresh cilantro.
Finish with a fresh squeeze of lime juice over the entire bowl before serving.