So the first thing you need to know is that Bet is scared of monsters, and of being eaten, and of course of being eaten by monsters. He'll play with a dinosaur happily during the daytime, but that night, out of nowhere he'll say "please don't let the dinosaur eat me."
The second thing is that although we tell the boys they can't fill up on X until they have some Y, we try not to set up one food as more desirable than another. We just say you need to eat different kinds of food, because if you only eat one kind of food, you might turn into it. Ho ho ho. Come on, have a bite of green beans.
With these two pieces of information, you can totally write the following ending yourself. And yet until he said it, I somehow never did.
BET: Can I have more lasagna?
EEMA: First have some of your veggies.
BET: I can't just eat lasagna. Because if I only eat lasagna, I might turn into lasagna.
EEMA: That's right.
BET: And then someone might EAT me.