Fun with food - Custard apple

I walked into the grocery store the other day and saw something in the fruit aisle that I have not seen before...

It doesn't look very appealing...does it?  Although, I have learned that fruit from Asia often doesn't look near as good as it ends up tasting.  The sign at the store said that this was a "Taiwan Custard Apple" which I have never heard of before. 

The outside of it is pretty rough similar to the exterior of a pineapple.  The size itself is larger than a normal apple and about the size of a small grapefruit. 

Cutting through it was not the easiest thing because the exterior was so tough.  The texture inside was basically that of a normal apple although slightly denser.  It smelled sweet so was excited to try it, however, I wasn't really sure how to best cut it.  Instead of the seeds being in just the center of the fruit they were all over like in a watermelon...

I did manage to cut away enough of it to taste it and enjoyed it.  The texture was like a normal apple but the flavor was much sweeter and actually did taste a bit like custard.  I would certainly eat more of it but it was similar to a lobster where it was just too much work for too little payoff.  I'd be happy for somebody else to cut around all of those seeds and then give me all the tasty fruit!