Slightly more effective and safer than simply sun-drying food is putting it in a solar food dryer, which helps protect it from insects and concentrates the sun's warmth right where you want it.
For even more control, place the food on wire racks in your oven at very low, steady temperatures.
An electric food dehydrator is the easiest and most reliable way to dry food. It is designed to provide just the right amount of heat and maximum air movement. Many food dehydrators have stackable trays, a small warming device and fan. You can also build your own.