I canned up the majority of my tuna for the year after my first trip out. Since then the majority of the tuna I've personally taken has been for high quality loins. I've put the lower quality loins aside in the freezer for eventual canning.
Well, I planned on doing some salmon smoking today and canning up those frozen tuna pieces and lower quality loins that I'd frozen...while going through the tuna, I pulled out some of the loins and decided to try smoking them. I have 2 brine recipes that I use for Salmon, one leaves a very firm felet, while the other leaves a much 'softer' meat texture.
I put the tuna into the brine that firms up the meat more (very high salt content in the recipe) for about an hour and put it on the top rack in the smoker (above the salmon so I could access it easier without pulling all the salmon out).
The tuna came out fantastic!! The loins were firm, and very tasty fresh from the smoker. I'll still can up some of this that I have, as it's belly meat, and small pieces, but it's a GREAT way to salvage those soft 'mushy' loins that you might otherwise have to can.