The technique I use is to first establish the base note for the left hand, which is usually a relatively low "A" note that is constantly held.

Next, play the melody with your right hand, using a Floyd Kramer type of fingering. I don't have my keyboard here at home right now, but if you listen to 254 in the attached midi you'll get the idea of how I do it. https://app.box.com/s/t6neciwv2k8iskswjtu2pw238r4x0nd8

Gary