What to do with remaining of the bitter gourd?
You can try to fry it with egg which some people say it can cover up the bitter taste of it.
If you do like the bitter taste, you can stir-fried the bitter with carrots and meats. While searching some recipes on bitter gourd, I come across this writer who wrote, “A Chinese chef that I knew told me to pick bitter gourd that has wide ridges, then it won’t be that bitter”. – http://belachan2.blogspot.sg/2013/10/bitter-gourd-with-eggs.html