My base is very condensed and needs to be watered down at the curry cooking stage
I'm not sure why your base would be in a very condensed form Chris? Which base recipe are you using? Surely the base should be ready to use, as is? I will add a little water to it if it has inadvertently become too thick.
Anyways, my recollection is that Darth's base certainly doesn't taste "crap" on its own. Like most other reasonable bases, it tastes like a mild curry flavoured vegetable/oniony soup. If it tastes crap (like pea and ham soup?

), perhaps something has gone wrong in its preparation.