
Mix together 1 tablespoon all-purpose flour, 2.5 teaspoons chili powder, 1 teaspoons paprika, 1 teaspoons garlic powder, 0.5 teaspoons cumin, 0.5 teaspoons kosher salt, and 0.5 teaspoons ground black pepper in a small bowl. Set aside.
Slice the 2 large boneless skinless chicken breasts into strips against the grain. Rub the fajita seasoning generously all over the chicken strips, pressing it in so it sticks.
Heat 2 tablespoons canola or avocado oil, in a large cast iron skillet or heavy pan over medium-high heat until shimmering. Add the chicken strips and cook undisturbed for 3–4 minutes to sear, Saute chicken until cooked through.
Remove chicken and set aside in a bowl.
in same skillet add the remaining 1 tablespoon oil and heat. Add the bell peppers and onion. Season with salt & pepper. Saute until tender.
Return the chicken to skillet and mix all ingredients together. Enjoy with tortillas, mexican rice, refried or black beans, pico de gallo, guacamole, salsa, and don't forget a squeeze of lime juice etc.