marinate the chicken:
In a gallon plastic storage bag, mix first 4 ingredients. Add chicken and coat each piece well. Close bag and marinate in refrigerator at least 4 hours.
cook the chicken:
preheat oven to 350 degrees
Remove chicken from marinade and place in a cast iron skillet. Add lime halves to skillet.
Bake in a preheated 350 degree oven for 1 hour or until internal temperature of thighs reaches 165 degrees.
Remove from oven. Place chicken aside and use the same skillet to cook onions and peppers.
Debone chicken. If the taste isn't "fajita-ey" enough to suit you, add in additional fajita seasoning and stir well.
cook onions and peppers:
Use the same skillet in which the chicken was cooked. Drain off some of the cooking juices, if necessary.
Add onion, peppers and fajita seasoning to skillet over medium heat. Cook, stirring occassionaly, until onions and peppers are tender and onions have started to brown.
compose the salad:
Toss lettuce with a small amount of dressing. Arrange lettuce on a large serving platter along with chicken, peppers and onions, cheese, tomatoes and tortilla chips.
Pass around sour cream, jalapeños, salsa and additional dressing.