Took this and made all the substitutions and different quantities - unless baking, i am liberal with the interpretation also due to not having the ingreds. and then cook via tasting.
So coke, ketchup, mustard, vinegar - malt and white-wine & japanese, half giant onion, bit of garlic, Worcestershire sauce - splash splash that will do, brown sugar - chuck it in, oh some honey just a bit as the ketchup has enough sugar in it I reckon, chilli powder - sprinkle, yeah more, I can eat hot, oh i got some dried chilli - put half that in too, pepper? nah, couldn't be bothered.
oh onion & garlic first - browned off.