Slice the chicken breast into thin strips and toss in a small bowl with chili powder, cumin, smoked paprika, sea salt, and black pepper until evenly coated.
Heat the olive oil in a large skillet over medium-high heat, then add the chicken strips and cook for 5-6 minutes until golden brown and cooked through.
Remove the chicken from the skillet and add the sliced red bell peppers and onions, sautéing for 4-5 minutes until they are tender and slightly charred.
In a separate small pan or the same skillet, lightly sauté the cauliflower rice and black beans for 3 minutes until heated through and fragrant.
Assemble the bowls by layering the cauliflower rice and bean mixture at the bottom, topping with the chicken, peppers, onions, and fresh avocado.
Drizzle the lime juice over the top and garnish with fresh cilantro before serving.