I didn't go to university what is inderal 10mg used for To ensure preservation of nutrients and texture on defrosting, you'll want to blanch your fresh veggies before freezing them. Blanching means placing vegetables in a pot of already-boiling water for a very brief period of time – just long enough to deactivate the enzymes that promote further maturation (and therefore loss of texture, color and nutrition) – but not long enough to actually cook the vegetable.