http://caves.org/section/vertical/nh/43/muenter.html
It works. The open “overhand shape” method is preferable though as it’s just as memorable and ergonomically easier to form and clip the biner into it IMO - or clip it into the biner. Just clip the two strands that make up the U-Turn bight. Personally, I wouldn’t use either method as I ALWAYS clip the rope into the carabiner first and then form the Munter on the carabiner. Same also for the Clove Hitch.