Rocco, all dehydrated foods are different, and some require different rehydration techniques. For some, you can just cold-soak the food, and one hour later it is good. For others, you cover boiling water over the food, and five minutes later it is good. For others, you simmer the food for a while, then let it stand perhaps in a cozy.
You really want to experiment with different techniques to find which ones work best with which food.