this is my technique:
stand on two feet.
put weight on left foot first, face front-right.
left leg is straight, right knee bends.
*stretch muscle around waist, like magic robe hang up your upper body*
next,
release the muscle on first step.
also push a slightly weight on bent knee
you'll notice that your hip will slide to left side and followed by turning waist to front direction
next,
put weight on right foot.
*no need to do a completely curved turn hip*
face front-left.
Don't try hard to follow the steps. Just look in mirror and you will see my latin motion without stress on knee ^^