You have plenty of water but you haven't eaten for five days as you have no food!

A boat pulls up next to you and the captain says he will help you but his help will be limited. He has all the world's foods on his vessel and you may have one mouthful of just one and then he's going to be on his toes.

What do you go for to give you the best chance of survival? As much as you can fit in your mouth but MUST be eaten there and then.

Quick responses appreciate.