Heat broiler to high.
Place parchment on baking sheet.
Slice bread in half lengthwise.
Place bread under broiler 2 minutes.
Put cheese and onion on top of bread.
Shred chicken or cut it into small pieces.
Mix chicken with BBQ Sauce.
Place chicken on top.
Place bread under broiler 2-3 minutes until cheese is bubbly.
Top with cilantro.
Cut and serve.
Drizzle on extra BBQ sauce over the top of pizza when serving.