When I made this recipe for my parents and brothers I used sausage instead of chicken because I didn''t have any. I also omitted the green chilis and added the olives, bacon, and also some red onion. It probably made the dish less "pizza mexicana," but it was delicious. I used both wheat and white pitas, and they were equally yummy. The meal was also surprisingly filling. Some corn and a salad added to the dinner and everyone really enjoyed it. Best of all, this was so easy to make!