For the Pizza: Punch the dough down, and divide into equal serving portions. Roll out each portion into an 6-8 inch flat circle. Spread 1/4 cup barbecue sauce over the surface of the dough. Distribute 1/2 of the cheese over the sauce. Distribute 1/2 of the chicken over the cheese. Place half of the onion rings over the chicken pieces. Place the pizza in the oven (on top of pizza stones). Bake until crust is crispy and cheese is bubbling (8-10 minutes). Remove pizzas from the oven and sprinkle each with 1/2 of the cilantro.