Using your hands, pat and spread the pizza dough until it is 1/4-inch thick. Brush one side with olive oil and put it, oil side down, onto the grill. Brush some more oil on top and close the cover. Cook until the bottom is browned and the top is set, about 5 minutes. Flip the crust over and cook on the other side until browned, about another 3 minutes. At this point you can remove it from the heat and set it aside until your guests arrive.