Are they frozen in juice/syrup? Are they whole and you want to keep them that way for use?
The first thing that comes to my mind is use an electric knife (at the very least, a serrated one) and slice off into usable slabs that you can thaw individually. The frozen mass should slide out of a plastic tub fairly easily for cutting.
The first thing that comes to my mind is use an electric knife (at the very least, a serrated one) and slice off into usable slabs that you can thaw individually. The frozen mass should slide out of a plastic tub fairly easily for cutting.