Stored in brine, water, or whey, fresh mozzarella is soft and full of moisture, which results in a damp crust and a horrible texture, and it won't brown as well in the oven. To avoid this, dry it by taking it out of the liquid and slicing it into thin pieces so as to expose more surface area, before finally letting it sit on a kitchen towel or paper towel for about 25 to 30 minutes.