Japanese superfood?

Yesterday I received this from one of our neighbours across the street. I was about to leave the house to do some errands on my bike and she was coming out of her garden with two of these in her hand. I rarely see her, so when she asked, "Do you eat these?" I wasn't about to say, "No." I asked her how to cook them and she gave me a simple explanation, then asked if I'd like one. I said we'd give it a try, so now I'm committed!

It is called a Bitter Melon (Goya in Japanese). By the looks of it on Google, it is something of an acquired taste, but it is, apparently, a Japanese "superfood". Has anyone out there got a good recipe for this?