Slice the chicken breast into thin strips and season evenly with chili powder, cumin, smoked paprika, garlic powder, onion powder, sea salt, and black pepper.
Heat the extra virgin olive oil in a large cast-iron skillet over medium-high heat until shimmering.
Add the seasoned chicken to the skillet and sear for 5-6 minutes, stirring occasionally, until golden brown and cooked through.
Remove the chicken from the skillet and set aside; add the sliced bell peppers and red onions to the same pan.
Cook the vegetables for 4-5 minutes until they develop a slight char but remain tender-crisp.
Return the chicken to the skillet, drizzle with fresh lime juice, and toss everything together to combine the flavors.
Scoop the warm cooked white rice into a bowl and top with the chicken and pepper mixture.
Garnish with sliced avocado and fresh cilantro before serving.