Freezing vegetables
Freezing is often considered the simplest and most natural way of preservation for vegetables (Cano, 1996). Frozen vegetables and potatoes form a significant proportion of the market in terms of frozen food consumption (Mallett, 1993). The quality of frozen vegetables depends on the quality of fresh products, since freezing does not improve product quality. Pre-process handling, from the time vegetables are picked until ready to eat, is one of the major concerns in quality retention.