I can't remember what we did about food that day. We were staying on Lipari, and the boat trip stopped at Panarea then Stromboli, before our night-time sail round the volcano (it was a balmy, moonlit evening). We must have eaten something! I have vague recollections of a rather large cafe/restaurant on Stromboli with lots of rather scruffy outside tables... There was one spot in the sea with rather menacing underwater fumaroles that made it look like the sea was boiling. I'll dig out my photos..