Vegetables -- you could dry a different one each day for a month and still not go through the entire list. Some are more suitable for dehydrating than others, but once you get started, you'll want to try them all.
To preserve most of the goodness in your dehydrated food, start with vegetables that are ripe and in prime condition. Buy or pick the crispest, freshest, most flavorful ones that can be obtained. Dehydrating retains most of the nutrition and good taste, but it can't improve on the original quality of the food. The fresher the vegetables are when processed, the better they will taste when rehydrated and cooked.
http://www.excaliburdehydrator.com/gen16.htm
The following charts are guidelines for the dehydrating of various fruits and vegetables
http://www.discountjuicers.com/dehydratingtimes.html
Eggplant Tacos
1 eggplant, thinly sliced into rounds
1-3 zucchinis
white onion
cumin
chili pepper
salt or miso
1/2 cup walnuts
salt eggplant. dehydrate at 105 degrees until they bend without cracking.
blend or process remaining ingredients. place mixture on eggplant slices and fold slices to make tacos. continue dehydrating for about 12 hours.