Let's cook.
In a medium bowl, toss the chicken strips with chili powder, cumin, smoked paprika, salt, and black pepper until evenly coated.
Heat olive oil in a large skillet over medium-high heat.
Add the seasoned chicken to the skillet and cook for 5-7 minutes, stirring occasionally, until browned and cooked through. Remove chicken from the skillet and set aside.
Add the sliced red bell pepper, yellow bell pepper, and onion to the same skillet. Cook for 7-10 minutes, stirring frequently, until the vegetables are tender-crisp.
Return the cooked chicken to the skillet with the vegetables. Stir to combine and heat through for 1-2 minutes.
Serve immediately with warm tortillas, salsa, and your favorite fajita toppings.
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