In a large, shallow bowl, combine the spices. Add the chicken strips to the bowl and toss until coated.
Heat the olive oil in a large skillet over medium-high heat. Add the chicken strips and cook on both sides until well-browned and cooked through.
Add the bell peppers and onion to the skillet. Cook over medium heat until the vegetables are softened, 5 to 7 minutes.
Return the chicken to the skillet and stir to combine with the veggies. Squeeze the juice of one lime over the chicken and veggies. Cook for 1 additional minute.
Serve with warmed tortillas and garnish with desired toppings.