Reduced fat cheeses can melt, but they may take longer to melt and be tougher during stirring. [2] X Research source
There is not a significant difference between grating, shredding, or slicing. You can use whichever option is most convenient for you.
Most cheese will come to room temperature in about 20 to 30 minutes. Do not leave cheese sitting out for more than two hours. [7] X Research source