Season the chicken breast evenly with chipotle powder, garlic powder, sea salt, and black pepper.
Heat the olive oil in a large skillet over medium-high heat and cook the chicken for 6 to 8 minutes per side until the internal temperature reaches 165 degrees.
Remove the chicken from the pan to rest, then add the sliced bell peppers and red onions to the same skillet, sautéing until tender and slightly charred.
In a separate small pan, warm the cauliflower rice and stir in the lime juice and chopped cilantro until fragrant.
Rinse and drain the black beans, then warm them briefly in a small saucepan over low heat.
Slice the rested chicken breast into thin strips.
Assemble the bowl by placing the cilantro-lime cauliflower rice at the bottom, followed by the black beans, sautéed vegetables, and sliced chicken.
Top the bowl with fresh avocado slices and an extra squeeze of lime if desired.