not sure if suggested before but didnt apper so
Antimicrobial herbs and spices, such as mustard seed, garlic, cinnamon or cloves, are often added. If the food contains sufficient moisture, a pickling brine may be produced simply by adding dry salt,Other pickles are made by placing vegetables in vinegar
so my idea is can pickle any of the vegtables or fruit (even flowers are known to be pickled and eaten), will boost the hunger and fep (based on what it already has)
also some recipes can be added for more speacilized pickling experience (are are tons of recipes alot that include in game foods already)