You do it best at the start.
Heat? the oil up really hot.
Then when you add a little curry gravy or garlic ginger puree it spits and splutters like mad.
It's these splutters that start the flames, it rapidly spreads to the rest of the pan.
To ignite these splutters you need to tilt your pan a little so it is angled into the gas ring flames.
Be very carefull and have a damp teatowel ready to extinguish flames if necessary.
It can be a really violent reaction.
Watch out for setting fire to your hair and clothes too, it is potentially very dangerous.
So..................
Get the oil really hot then a dd a little of curry gravy and it should go!!!
I don't think it gives the missing flavour, though