Roll pizza dough into large circle. Prick with fork. Add olive oil to cast iron skillet. Put dough in skillet and brown both sides. Once dough is cooked slice in half lengthwise so you end up with two round halves. Place circle of dough,cooked side down, on baking sheet. Layer inside of circle with chives, cheese and half of the truffle oil. Put second circle on top. Bake in preheated 500 degree oven for 5 - 8 minutes or until cheese is melted. Remove from oven and drizzle with remaining truffle oil. Cut into slices and serve immediately.