What is the wrinkled green vegetable that looks like a zucchini?

That would most likely be a chayote.

Here are some details to help you confirm:

* Appearance: Chayote has a pear-shaped, wrinkled green skin that can resemble a zucchini, but it's smaller and has a more elongated shape.

* Texture: The flesh is white and crisp, similar to a cucumber or jicama.

* Taste: Chayote has a mild, slightly sweet flavor.

Let me know if you have other details about the vegetable, and I can help you narrow it down further!