Help how do i teach my dog not to eat off the babys tray when where eating?

[Morgan Lund]

When where eating she can't be with us cause shell take food from the baby's tray how do I stop this yes she's getting fed enough so how do I teach her to stop doing this so she can be inside more often ? Also is it ok she eats outside cause if we keep her food in here the baby will make a mess with it