Preheat the oven to broil at low or 450°F. Cut the chicken into 1/4-1/2 inch thick strips.
Julienne the bell peppers and cut the onions into half rings. Place the chicken and veggies onto a sheet pan. Toss the with the olive oil and fajita seasoning.
Bake for 15-20 minutes, or until the chicken is cooked through and the veggies are tender. Drizzle lime juice over the chicken and vegetables. Serve and enjoy!