Place the bags in a freezer set at 0 F or below and leave them at least 48 hours. Place in an oven preheated to 160 F for 30 minutes. A food dehydrator is a small electrical appliance for drying foods indoors. A food dehydrator has an electric element for heat and a fan and vents for air circulation. Dehydrators are efficiently designed to dry foods quickly at 140 F. Food dehydrators are available from department stores, mail-order catalogs, natural food stores, and seed or garden supply catalogs.
Some models are expandable and additional trays can be purchased later.
Twelve square feet of drying space dries about a half-bushel of produce. The major disadvantage of a dehydrator is its limited capacity. Wood is not recommended, because it is a fire hazard and is difficult to clean. Enclosed heating elements. An enclosed thermostat from 85 to 160 F and a dial for regulating temperature.