I just put eight burgers in the sous vide with one side coated with the dehydrated chopped onions. They re-hydrate in the SV and I can make a pretty good imitation of a White Castle burger.
Pasteurized in the bag, they keep for weeks in the bottom drawer of the fridge.
Burgers and fries tonight with a salad...F*cking chicken got in the house and ruined all my tomatoes!