When ready to cook, if using oven, preheat oven to 400 degrees F. Arrange the top rack three to four inches from broiler and the bottom rack about 4 to 5 inches below, if oven allows.
Whisk together all marinade ingredients. Set aside and reserve about 1/4 cup. Place the chicken and the remaining marinade in Ziploc set aside for 1/2 hour; may marinade for up to four hours but if doing so refrigerate.
Drain chicken and spread across one sheet tray. Add the vegetables to another sheet tray and toss with oil, salt, and pepper.
Place the sheet tray with the chicken on the top rack of the preheated oven and the sheet tray with the vegetables on the bottom rack. Roast for 12 minutes, stirring once until chicken is almost done and with no to very little pink when several strips are tested. The chicken will not be browned at this point.
Remove the chicken, drain of any excess juices, then add the vegetables from the second tray, toss together, and spread out across the sheet pan. Turn on broiler (to high if that option is available) and broil until the chicken has picked up some color and vegetables are lightly charred in spots, stirring once if necessary. Remove from oven and while still piping hot, drizzle with the reserved marinade and toss.
In the meantime, heat a burner to medium-high. Place each tortilla on burner for several seconds, turning as soon as the first side has picked up a little color. Remove tortillas as each is done, stacking on a clean kitchen towel; fold half the towel back over the tortillas as each is added.
Serve fajitas on tortillas with desired garnishes.
Keywords: Bargain Meal of the Week, Bell Peppers, Chicken, Chicken Breast, Fajitas, Lime, liquid smoke, Red onion, tortillas