01 -
In a mixing bowl, combine olive oil, lime juice, and fajita seasoning; whisk to combine. Pour the marinade into a large Ziploc bag.
02 -
Add the chicken breasts to the marinade, seal the bag, and refrigerate for at least 20 minutes and up to an hour.
03 -
Cut the peppers in half and discard the tops, seeds, and membranes.
04 -
Preheat an outdoor grill to medium heat. Clean the grill grates, then lightly oil the grill grates.
05 -
Remove the chicken from the marinade and shake off any excess. Discard the marinade. Place the chicken, peppers, and onions on the grill. Cook, turning occasionally, until the chicken is no longer pink and the veggies are tender; about 15 to 20 minutes. Ensure chicken has an internal temperature of 165˚F.
06 -
Remove the chicken, peppers, and onions from the grill, and let them rest for about 5 minutes.
07 -
Warm the tortillas on the grill for about a minute per side.
08 -
Cut the chicken, peppers, and onions into strips. Arrange onto tortillas and serve with desired toppings.