The gravy tends to thicken while it rests, so adjust the consistency to suit your taste. If you want to reduce the qty of coconut milk, pressure cook the peas with more water, so you will have more stock to make the gravy. I've also tried this recipe, without grinding the masala. Though the taste was good, I was happier with the consistency, when using a ground masala. Since salt is already added to peas while cooking, be careful while adding it to the gravy.