Most food products require drying to remove excess water in order to prolong its shelf life by preventing microbial deterioration. Often, product quality degrades during the process due to thermal degradation and denaturation. Therefore, low-temperature drying such as freeze-drying is preferred for the drying of these food materials to produce high-quality dried foods. It is well known that freeze-drying can preserve color as pigments are susceptible to thermal reaction; produces more porous and better textured dehydrated products as sublimation of ice leaves pores within the solid matrix, thus making the matrix softer and giving a high rehydration ratio; and gives excellent retention of aroma compounds and bioactive ingredients due to low-temperature processing.