Freeze dryers make preserving food a walk in the park. You can preserve anything from fruits to vegetables, dairy products to desserts, and even full blown meals such as lasagna and scalloped potatoes. The process takes anywhere between 24 to 36 hours, after which you can stow the dried up food into canning jars for snacking on whenever the cravings kick in.
Freeze drying retains the original shape, color, flavor and nutritional value of the food. Unlike canning and dehydrating that takes a toll on the nutritional value, freeze drying keeps it exactly how it was when first harvested.