Hi Chaps,
Been reading and watching the c2g post's with much interest. This one (the spiced/seasoned oil) is the one that's bothering me the most.
I'm never going to make a batch of 40 onion bhajis, so, this particular seasoned oil is possibly unobtainable, for me at least.
Now, this is the part that is really niggling me. The usual suspects/ingredients in onion bhajis: Onions :

, mixed powder, g/g paste, salt, chilli powder and then you have egg, besan, fennel/aniseed, kashmiri masala paste and sometimes potato. I should imagine that the flavour that is imparted into the oil from these ingredients, is quite subtle? Is it really going to make that much difference?
Now, at the start of most curries, in the main, we start with hot (pure) oil, then fry off g/g paste, then add the mixed powder, in goes the tom puree then a spoonfull of base. Just give the pan a tilt and look at the colour of the oil. Is this now not seasoned oil? I would say that it is and I would say that it is far more seasoned and concentrate in flavour than a batch of bhaji oil could provide!
My usuall method is to start off with way too much oil, and then spoon off what I don't want at the end. I filter this and store in the fridge, then use it to start off my next curry. For me, it seems to add a little depth and sweetness but, it wouldn't be the end of the world if I didn't have it. Maybe you guy's would like to adopt that method to produce a more realistic and practical way of getting your seasoned oil?
Ray
