The cut frozen food?

No secret that the supermarkets and shops to buy food is dangerous!So I try to buy fish in the port, the meat on the farm.When all the meat is clear, cut into portions in polyethylene and in the freezer.That fish already did not work - you buy frozen you come home and have to wait a little defrost and start cutting into portions and in the freezer.And what would could be cut frozen fish into large pieces, for batch thawing?