Heat oven to 425°F. Spray 15x10-inch or larger cookie sheet with cooking spray.
In 10-inch skillet, heat oil over medium heat. Cook red onion in oil 5 to 8 minutes, stirring occasionally, until tender. Remove from heat; set aside.
Unroll dough on cookie sheet; starting at center, press out dough into 15x10-inch rectangle. Spread barbecue sauce evenly over dough. Top with red onion, pork and cheeses.
Bake 15 to 16 minutes or until crust is golden brown and cheese is melted. Sprinkle with cilantro and green onions.