Thanks guys, I added some extra cashew as courton suggested, as well as about a half a cup of coconut milk (I used that instead of cream as I was making a dairy free version), it was still overly cinnamonny, but not bad... I think it was just a particularly fat cinnamon stick that I used
will cut back in future!
In conclusion, although it wasn't like the korma I've had before (and after researching a little, it seems that korma is one of those dishes that changes depending on what region you're getting the recipe from) it wasn't a bad dish, DH commented that he quite liked it and would definitely have it again. So all good