One way to convince a child to try out an unfamiliar food is to say that it's an alternate form of pizza. Here are some examples. Feel free to add more in the comments.
- Quesadilla: Mexican pizza
- Dosa: Indian pizza
- Quiche: French deep-dish pizza
I had originally listed crêpe as French pizza, then realized it's more like a French pancake. (I wonder what the Italian version of pizza would be...)