Have you ever seen a karela?

Bitter Gourd Curry (Karela/Kakara Kaaya Kura)

Above you can see a karela cut in halves...

and this is the flower of the karela

 

It's known as a bitter melon, and you can make juices 

 

 

and dishes with it.

It is also known to aid in the metabolism of carbohydrates and hence it is useful in Diabetes Mellitus. Karela is an excellent blood purifier, activates spleen and liver and is highly beneficial in diabetes.

note: if you like Indian Food, this is a gorgeous blog with lots of recipes and fantastic images:
Mahanandi