The plant you asked is called Zanzi. You can fry it or make soup. But the soup is the best. The bitter thing is that you ate the over-ripe melon. This kind of melon should be tender, and don't eat the pedicel. Don't waste it too much, just cut it off. It can dehumidify and remove swelling. (That is to say, lose weight) Don't eat it for people who are too thin. Eat it in summer to get rid of the heat.-