First I would like to thank you ZoS for including fish into the provisioning system.
The problem is to make fish an ingredient, a player has to use the fish in their inventory; one fish at a time. I'm holding on over 3000 fish which will take roughly 100 mins for me to covert them to ingredients.
Could this pleased be changed to something similar to extracting with blacksmithing, clothing, and woodworking; or let players "Use" the entire stack of fish? As it stands this system is incredibly tedious. This is still a big time sink for those who don't have a horde of fish; returning with 50-100 fish per fishing trip.