Preheat oven to 400 degrees F. Line 2-3 rimmed sheets pans with foil & lightly grease.
Combine grated peel, lime juice, Avocado oil, sea salt, paprika, cumin, garlic powder & oregano in a very large bowl and whisk until mixed well. Add peppers, onion & chicken. Stir until mixed and dressing is covering all ingredients. Pour onto prepared pans and bake for 15 minutes.
Remove from oven, stir, breaking apart any pieces of chicken which are stuck together. Place pans back in oven, rotating the pans from the direction they were in originally and bake for another 10-15 minutes until chicken is cooked through.
Right before serving, sprinkle with chopped fresh cilantro and lightly toss. Drizzle chicken well with pan juices. Serves 20-25 people, depending on how many side dishes accompany it. Serve with the side dish of your choice, and a nice tossed salad. *If making in advance and reheating, reheat in a large casserole dish or roasting pan, covered, stirring occasionally to incorporate juices throughout to keep the chicken from drying out. When serving, spoon juice over chicken to keep moist.