Bitter Gourd, (Momordica charantia L.) is peeled and you eat the peel. Cook in a wok with lean meat and green onions, broccoli.  Use rice wine vinegar, ginger, soy and a teaspoon of oyster sauce for the sauce.  Add a few drops of sesame seed oil after it has cooked.  (More).  

Also see Chinese Medicine.

Plant the seeds and you will be amazed at the climbing vine and its spectacular fruit.  This is a tropical plant keep it wet.  Found in abundance around Bombay, India.

Excellent food for diabetics.   Chemistry is also anti-viral.

Traditionally in India fruit is steeped in warm salt water before being cooked.