If you mean me using spices such as Coriander, turmeric,cumin..etc, then yes i do add all these spices. Anyhow, it mentions in my [Madhur jaffery cookery book], that yogurt should be added. I was rather surprised when i read this. I would have thought that adding yogurt, would have given the dish a soury taste & not quite as creamy!
Also...when ordering a korma from my local takeaway, i dont or cant taste yogurt in it at all. I was looking to emulate the takeaway type of korma...so thats why i prefer to leave the yogurt out. Even if the kormas I'm making didn't have that tangy unwanted taste, it still is nowhere near as good as the takeaway ones.
Ive read that most Indian takeaway chefs are actually Bangladeshy.