when he said slices - I took as slices of pie the way some people drain off oil from pepperoni - the moisture comes out of the cheese during cooking not before so "draining" the cheese won't work
Looked around a bit & found this - Cell may have been on to something - although it doesn't absorb all of the moisture - never heard of doing this. I've just been limiting how much I put on the pie - like the below picture (also from the article)
[URL unfurl="true"]https://www.thespruceeats.com/preventing-watery-fresh-mozzarella-pizza-591330[/URL]
Scamorza may fill the bill.
