Goya is an odd vegetable. It's pretty bitter but it's revered because it's considered to be healthy. In Vietnam we have an idiom called "thuốc đắng dã tật, sự thật mất lòng", which means "bitter medicine cures illnesses, [and that] the truth is not forgiving" and because of that, goya is thought to be a good vegetable to consume, much to the dismay of the youngsters who definitely don't like the bitterness.
Goya in Vietnamese is khổ qua, which is the sino-vietnamese pronunciation of whatever it's called in Chinese. Funnily enough, the name of the vegetable is also a pun as khổ means suffering and qua means over, so the name can also mean [the] suffering [is] over. Therefore, some people will eat those as a charm for warding bad luck, and during Lunar New Year, goya is one of the main ingredients used for the feast.
There are 2 ways of eating goya that I love. The 1st one is to make a soup out of it. The goya is deseeded, and a mixture of minced pork, mung bean vermicelli and wood ear mushrooms is stuffed into it. Cook it in some pork stock or just water with bouillon powder with some thai bird eye chilli and done. The chilli can help reducing the bitterness of the goya, and the whole soup can be served with rice for a full meal.
The second way is to chill the deseeded goya to firm them up then slice into very thin slices then served the cold goya with some pork floss on top. This is mainly a snack or a salad side dish kind of thing but it's rustic taste is out of this world. Chilling the goya also help reducing its bitterness as well, or so they say that here.