I saw this technique in the series Kitchen Chemistry by Heston Blumenthal and thought I'd share it here. Obviously the quantities don't matter just do as many as you want. You'll need a thermometer to do this recipe properly, but for the pre-cook you can just use a meat thermometer and could probably get away with guessing the warm versus hot oil temperature. I personally used bran oil but I think peanut oil would be another good choice but nothing wrong with just using regular vegetable oil either. I used a wok, Chinese scoop and infrared thermometer for the deep frying which is a neat way to deep fry using the more expensive oils because you need less oil in total and don't feel so bad using fresh oil every time.
Anyway back to the recipe, the title came from the series and after trying them I think I'd have to agree with Heston. Not as much effort as it sounds and really worthwhile.