A tiny green eggplant which I've only ever had in Thai green
curry. They are usually sold - if you can find them at all - in
bunches. They are the size of (guess!) peas, and look like a
bunch of tiny anemic dried-up green grapes with very long stems.
Pea eggplants have a peculiar bitter taste which would make them
unsuitable for, say, stir-frying, but they do add a certain
something to green curry. The only bitter food I had in Thailand
that I liked.