I am going to be controversial.
In my opinion the very best way to practice PFls is to take the unsuspecting group member to an airfield to practice touch and gos. Let them set up down wind or where ever and cut the power. That is how it happens when you least expect it and a successful landing demonstrates just how well or badly the PFL went. Having got one out the way go back and practice technique – and thereby comes the earlier contributions on best methods.