Preheat oven to 450 degrees and place the oven rack in the lower half of the oven.
Mix 2-3 tablespoons of the barbecue sauce with the chicken.
Place the naan on a rimmed baking sheet. Top each naan flatbread with the remaining BBQ sauce, followed by the cheese, chicken and BBQ sauce mixture, and sliced onion.
Bake for 10-15 minutes in the lower part of the oven, or until cheese is melted and crust is browned.
Top each pizza with one tablespoon of chopped fresh cilantro.
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