1、what do you like to eat?

2、what do you like eating?

前者是指想要吃些什么，后者是指习惯喜欢吃些什么。

补充：like to do表示偶尔或一时兴起喜欢做某事，例如：I like to go travel.

like doing表示经常喜欢做某事，例如：I like playing basketball after school.

3、What your favorite food？你最喜欢的食物是什么？