After soaking cold water, they are boiled to increase their volume for further process. After boiling the chopped onions, their weight and volume increases very rapidly. Raw onions or fresh onions are considered good for salads and sandwiches. But use of dehydrated onions are as good as fresh onions and also are good enough to use them on the place of fresh or raw onions.
Dehydrated food materials take little bit of time in preparation. Some of the dehydrated food materials are prepared more quickly than freshly prepared food. Dehydrated onions are one of such food article. They are dehydrated in oven or by other means. They are soaked in water prior using them in any type of food material. It is easy to use these onions in dehydrated form and it takes about 10 minutes to being processed as raw or fresh onions take.
Most of the dehydrated vegetable prepared can be prepared to eat only in 30 minutes on dinner table. Crock pots are considered good to cook the dehydrated vegetables. Rehydration of the dehydrated food is necessary to cook them efficiently.