Potato is an important part of the Indian diet and is used in combination with almost all vegetables and as snacks too. Being bulky and semi-perishable in nature, transportation of potatoes is very costly. Availability of fresh potatoes is a big problem in far-flung mountainous regions and hostile weather conditions where transportation facilities are not easily available, particularly for the Indian defence troops operating there. If potatoes can be made available in dehydrated form with higher nutritive value which can be preserved for up to 6 months under varying climatic conditions and can be restructured by simple rehydration/cooking method, that will solve much of the problems of food availability and nutrition under adverse environmental conditions. The dehydrated products are also the preferred convenient food by working/young/older populations throughout India. The invention relates to a process for the preparation of high-quality dehydrated potato cubes and shreds comprising the steps of peeling cleaned raw potatoes, subjecting the same to the steps of dicing in varying sizes and shreds, followed by osmotic dehydration with chemicals for specific duration and short time dehydration at higher temperatures to obtain potato cubes/shreds with low moisture content. The dehydrated products having long shelf life (up to 6 months) at ambient temperatures can be reconstituted by simple rehydration process/pressure cooking for use as curried vegetable, in soup or as snack.