Take two long pieces of tin foil and lay overlapping each other to make a large square. Spray with cooking spray. Roll dough in a large circle, about ½ inch thick and place on top of sprayed tin foil. Spray top of pizza dough with cooking spray. Holding each end of the foil, carefully place on the grill (with the foil on the bottom). Close grill lid. Cook for a couple minutes, until the bottom of the crust is how you like it. I like to rotate mine if I can because some spots in my grill get hotter than others.