As I am sitting here with my other half who loves her canning of jams I was curious; can you jar fish in the same manner without a pressure cooker?
She says the jam contents go in the jar warm/hot and as they cool they create the seal due to contraction. If using a pressure cooker as I am reading online it is going to cook the fish regardless so you need heat and perhaps her jamming method would work?
Totally new to this whole thing but wifey is 'jammed up' (horrible pun) that I am thinking of getting involved with the canning process as normally when she does it with her gal pals I go to the pub and watch sports and drink beer with my buddies.