Hi BeachBum, in the April courses you will learn the pastes that you use and can then create big quantities from without having to make one portion, add to a pot, then another portion and add to a pot etc.
For example here in Aus it is comon to have a buffet in the restaurant where there will be 3 veg dishes, 3 non-veg dishes and all the other side dishes. Meat is pre-cooked, paste is added to a pot with perhaps a couple of other spices ie mustard seeds spluttered in oil with curry leaves, then in goes the onion paste, add the meat and some stock, add some boiling water then add coconut milk powder bring to boil simmer, adjust seasoning and pour into the bain-marie for service.
People will pay $20 for all you can eat etc.
I'm sure the restaurants in the UK must offer a similar thing, perhaps someone could ask Az how to do it if you were having 10 people around and wanted to make a big batch. I'm sure he wouldn't say make one portion, then another and another...
Cheers,
Mark