pizza: What is the culinary purpose behind putting plastic wrap over the bowl in which you've made your pizza dough while it rises? Also, what is the purpose of coating the dough/bowl with olive oil before letting it rise?|||coating the dough ball = so it will not dry out and become crusty.. oiling the bowl so it will not stick there are some people who cover the bowl with a damp cloth to maintain a miost air for the dough.. it such a tiny amount of oil it can not be tasted|||The oil is to keep the dough from sticking to the bowl and the wrap is to keep the warm air in.|||The oil adds moisture to your dough as well as keeping it fresh, and the plastic wrap keeps the top when rising from getting crusty.