we dehydrate a lot of stuff in the Household here. For most things- asparagus, tomato, strawberries, cherries, bananas, apples, walnuts- ah, the list is endless- for most things there aren't any recipes, but if it's a "browning" fruit, we do use a lemon juice wash first.
For fruit leathers we make a paste of whatever, often apples are the base, and add some cinnamon, occasionally nutmeg or cardamom.
meats vary a lot. My favorite for beef is super thin slices and a tabasco/tamari (wheat free soy sauce) mix with some rosemary and nepitella in it. marinate for a few hours or overnight and go to town.
For biltong we don't do anything beyond a quick roll in salt and pepper.