Pre-heat your outdoor grill to medium heat.
Mix the bbq sauce and tomato sauce in a small bowl.
Roll out the pizza dough very thin (about ¼ -1/2 inch thick).
Brush the dough lightly on both sides with olive oil.
Grill the dough on both sides for about 1 minute (or less) per side (just long enough to make light grill marks on the dough, but not to cook it completely).
Remove the dough from grill and begin to add your ingredients. Start with your sauce, then layer with chicken, onion, tomato, and cheeses.
Slide back onto the grill. Cook for approximately 8 minutes (see instructions above for the method).
When the dough is crusty and cheese is melted remove from heat.
Garnish with chopped cilantro and scallions.
Slice and enjoy the heck out of this pizza!