Slice the chicken breast into thin, even strips.
In a small bowl, combine the chili powder, ground cumin, garlic powder, sea salt, and black pepper.
Toss the chicken strips in the spice mixture until they are thoroughly coated.
Heat the olive oil in a large skillet over medium-high heat.
Add the chicken to the skillet and sear until golden brown on all sides, about 5 minutes.
Stir in the sliced onion and bell pepper, cooking for 3 minutes until they begin to soften.
Pour the tomato sauce and chicken broth into the skillet, stirring to combine and scraping up any browned bits from the bottom.
Reduce the heat to medium-low and simmer for 5-7 minutes until the sauce has thickened and the chicken is cooked through.
Serve the saucy chicken and vegetables over a bed of warm cooked white rice.
Garnish with chopped fresh cilantro before serving.