We made a big batch of wontons recently. We made some soup, fried some for a snack, and then put the rest in the freezer. Of course, when we defrosted them in the refrigerator, the ice in the filling dissolved the skins and they all stuck together in a big messy clump. What's the best method to avoid this? Prefreeze on a sheet pan? Individually wrap them? Remove them from the freezer bag before defrosting? The problem didn't seem to be in the freezing, but in the defrosting.