[spicymaki]

This is a common anecdote. Long time vegan/vegetarian has onset of pain or tiredness and after one encounter with magic meat all problems go away immediately. No one ever knows what was missing in the diet, because it does not matter anymore. For you it is pastrami for others it is organic grass fed cattle, chicken, fish, or oysters.

The disease you were likely suffering from was mental. Being different wears on you and the micro aggressions of being a minority wears on you after a while. The food industry ads, cooking shows, bbqs, nostalgia, that random guy that says being vegetarian is dumb or deadly, etc. The mental pain builds up and causes the damn to break after a while.