Aubergines / Eggplants are sometimes bitter or particularly seedy.
Since this is at the market or supermarket, we can look at it, smell it and carefully touch it, but not poke mushy indentations in it or pierce its skin.
Is there a way to tell whether it is bitter or has many seeds?
Best Answer
Eggplants become bitter as they mature so your best bet is to buy freshly picked eggplants and to use them as soon as you can. Look for a full-size eggplant with a glossy and firm purple. Once an eggplant's color dulls, it becomes more bitter.
The "seediness" of eggplants may also vary depending on what variety of eggplant you've purchased so try a variety of them to see which ones you like best!
If you end up with a bitter eggplant, try slicing it, salting the slices, and allowing them to drain for an hour. Then, remove excess salt and moisture by pressing on the slices with a kitchen towel. This can help the eggplant taste less bitter.
Fun fact: Eggplants are bitter because they contain phenolic compounds, which impart bitterness! Lots more great science about eggplants in that link :)