It kinda depends on what you're tanking and your current stats, some people might advocate stam/expertise if you are low, or maybe even hit, however I think overall the best food is stam/agi. The benefits from agi (armor, dodge, and even a little bit of threat from crit) I think outweigh any other stat though.
So my opinion: 40stam/40agi is the best overall tanking food for warrior/pally.
(tbh though except for anub or really tough fights I slouch and just eat the fish feast)
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