Step 1:Get yourself a decent, well seasoned, cast-iron or mild-steel (i.e. "carbon-steel") wok/karahi. I use a fairly heavy cast-iron wok (see photo 1).
Step 2:Get yourself a decent gas burner and connect it to a bottled LPG gas supply (photo 3). A domestic gas hob typically consumes about 12 MJ/h of gas. You really need a consumption of
at least 18 MJ/h (such as a barbecue wok burner).
The burner I use is 32 MJ/h (when the gas pressure is lawfully "regulated"). Mine is "unregulated" but controlled (oops! - see photo 2

). Restaurant burners are typically 100 MJ/h and above (gosh!

)
Photo 4 shows my burner ready for action!
Step 3: Heat your wok until whisps of smoke appear. Add your oil (lots of it!) and heat until it just begins to smoke.
Step 4:Add your onions (if using) and fry until just browning. Shake and stir continuously (the wok and its contents, I mean, not yourself!

)
Step 5:Add other finely chopped veggies (if using). Shake and stir.
Step 6:Add garlic and ginger (if using) in quick succession. Shake and stir until garlic is just beginning to brown.
Step 7:Add tomato paste and shake and stir
Step 8:Add salt and spices (I make a runny paste of them out of water. This prevents everything from burning! - see photo 5)
Note: Steps 4 to 8 should take no more than a minute or two in total!
Step 9:Add precooked meat (I'm making prawn curries here so I add the prawns at the end). Shake and stir vigorously (the wok......never mind

).
Step 10:Add curry base, a ladle at a time.....stir vigourously....and stand back!

(see photos 6, 7 and 8 ;D)
NOTE: THIS IS VERY DANGEROUS!! I ADVISE AGAINST DOING IT INSIDE OR ANYWHERE WHERE CHILDREN ARE PRESENT! MIND YOUR EYEBROWS AND ANYTHING ELSE WHICH IS FLAMMABLE!
NOTE: YOU ARE ADDING WATER TO VERY HOT OIL IN EACH OF THE ABOVE STEPS. IGNITION CAN OCCUR AT ANY TIME! YOU HAVE BEEN WARNED!
Step 11:Reduce the heat and add any remaining ingredients and adjust to your liking
Step 12:Stand back and admire your handiwork and go "Ahhhhhh! That smokey and toffee-like taste that I get from my local BIR! ;D"
Step 13:Sit down and EAT your handiwork!
Well....someone had to eat the stage props!
