Slice the chicken breast into thin strips and place them in a bowl.
Toss the chicken with chili powder, ground cumin, garlic powder, sea salt, and black pepper until evenly coated.
Heat the olive oil in a large cast-iron skillet over medium-high heat.
Add the chicken strips to the skillet and sear until golden brown and cooked through, approximately 5 to 7 minutes.
Remove the chicken from the skillet and set aside on a plate.
In the same skillet, add the sliced bell peppers and red onions, sautéing for 4 to 5 minutes until tender-crisp and slightly charred.
Return the chicken to the skillet, drizzle with fresh lime juice, and toss everything together to combine.
Garnish with fresh cilantro and serve immediately while hot.