There are methods to rack the slide of a semi-auto handgun with one hand, but I prefer to relegate them to emergency use only.You also have to consider that you may only have one hand available when you need to draw.
I practice drawing my (unloaded) firearm from my carry holster quite a bit, finishing with a dry fire.
The original developers of the Israeli Technique (hammer down on empty chamber) were not the Israelis, but W.E. Fairbairn and later Eric Sykes:
http://thinkinggunfighter.blogspot.com/2010/09/myths-of-israeli-method-of-carry-or-why.html