Vegan cheese has come a long way from the days of plastic tasting, unmeltable slices. Now we have shreds, blocks, and many other slices to choose from and several brands who make all of these options! Most vegan cheese options out there now do a pretty great job of melting, but, for the most sure way, spray some water on to the cheese or into the pan you're cooking in, and cover immediately. This will create a steam dome and allow the cheese to melt better.