Preheat oven to 425 degrees F or prepare grill for medium-high heat.
Tear off four large sheets of heavy-duty aluminum foil.
In a large bowl, combine chicken, peppers, and onions.
Add olive oil, lime juice, chili powder, smoked paprika, cumin, garlic powder, onion powder, salt, and pepper. Toss until everything is evenly coated.
Divide the chicken and vegetable mixture evenly among the foil sheets.
Fold foil over the mixture and tightly seal the edges to create packets.