1 year old throwing food 😑

How do I get my 15 month old to stop throwing the food off his tray during meal times? Sometimes he does it because he’s done with that particular item, sometimes he seems to do it for no reason at all. We have always given him more of whatever he wants regardless of if there is still other things on his tray, so it’s not like he has to have an empty tray to get more of what he likes. I tel him “food stays on our tray” “you don’t have to eat it, but please don’t throw” “NO”. I physically stop his hands. I’ve even started making meal time over once he starts throwing (but I don’t like this because if he’s still hungry I want to feed him 🤦🏻‍♀️) I’m just at a loss what to do to effectively stop this behavior. He can clearly communicate “all done” & “more” so idk why he’s doing this. He will literally throw food off, then ask for more 😑 & then eat more (sometimes even of the same thing he was just throwing)