Begin by heating the olive oil in a large skillet over medium-high heat until shimmering.
Carefully add the thinly sliced chicken breast to the skillet. Sprinkle with chili powder, cumin, garlic powder, salt, and freshly ground black pepper. Sauté the chicken for approximately 3-4 minutes, stirring occasionally, until the chicken is cooked thoroughly and is no longer pink in the center.
Incorporate the sliced bell pepper and onion into the skillet. Sauté together with the chicken for an extra 2-3 minutes, or until the vegetables are tender yet still retain a slight crunch.
Remove the skillet from heat. To warm the flour tortillas, place them in a separate dry skillet over medium heat. Heat each tortilla for about 30 seconds on each side or until they are soft and pliable.
On each warmed tortilla, place a generous portion of the chicken and vegetable mixture. Be careful not to overfill to prevent the tortillas from tearing.
Top the filling with a sprinkle of chopped cilantro and a good squeeze of fresh lime juice for added brightness. Gently fold the tortillas over the filling, wrapping them snugly.
Present the fajitas immediately while hot, accompanied by lime wedges on the side for those who desire an extra burst of zest.
Notes
For an inviting presentation, serve the fajitas on a rustic wooden board with lime wedges and cilantro.