How do I remove bitterness from bitter melon
Some people claim you can reduce the bitterness of eggplant by slicing it then salting the slices, wrapping in a clean cloth, and putting some weight on it.  The salt draws out moisture.  It's possible a similar technique would work with your bitter melon, although I had never heard of it before your question.  It might not save much time, but you wouldn't have to watch them while doing the salt treatment.