Placing a cup of water next to cold pizza when reheating in the oven can restore a soft crust

Principle and Method: Pizza or bread that has been refrigerated tends to become dry and hard when reheated. Placing a small cup of water inside the microwave or oven (or lightly misting the pizza crust with water) allows the steam generated during heating to replenish the moisture lost from the dough, keeping the crust crispy on the outside and soft on the inside while the cheese melts.