What has to be broken before you can eat it?

“A nut”

While nuts need to be cracked open to eat, the riddle specifically refers to something that is typically 'broken' rather than 'cracked', which aligns more closely with an egg.

“Bread”

Bread is often sliced, but it does not require breaking in the same sense as an egg, which must be cracked open to access its contents.

“A piñata”

A piñata is broken to release candy, but it is not typically associated with eating in the same immediate context as an egg, which is directly consumed after being broken.