Sometimes I buy bruised fruit, like bananas, on sale, then I dehydrate them. I have two dehydrators and have also used my oven in a pinch (but you have to buy the mesh mats or the food falls through the oven racks)
I've dehydrated bananas, apples, lemons, rhubarb, carrots, celery, potatoes, brussel sprouts, cabbage, yams (sweet potatoes), zucchini, cherries, mushroooms, bell peppers, and all kinds of herbs including parsley.
|Dehydrated Brussel Sprouts|
Then I keep the dehydrated food in a dark cupboard. I'm running out of room so have to find another dark spot. A closet works fine.
There's two great things about dehydrating food for emergency food supplies - they last a long time and they take up very little room. You can see how much room 24 brussel sprouts took up once I dehydrated them! To cook 'em just rehydrate overnight or toss directly into your pot.