I make a bowl of veggies and sit close to him. I say in a bit of a silly voice “these are MY veggies and not for you. Don’t eat them they are mine!!!”.
Then I ever so slowly grab a veggie and do the most excited face ever as a move it towards my mouth. He will take it off me and eat it, laughing as I express exaggerated disappointment.
Then keep repeating.
Cannot believe how many veggies he ate today when I played this game.