If Jesus died on the cross why did he come back 3 days later and ask for food and drink dead man dont eat food and drink?

Jesus ate food and had a drink to demonstrate that He was rally alive as a physical person, not just a Spirit. He also showed them the scars in His side and the nail prints where He had been nailed to the cross.

It is quite true to say that dead men don't eat food and drink. Jesus was not dead and so this is why He did this.