Navratan curry

This is an Indian vegetable korma with nuts, paneer cheese, and an adjustable list of vegetables. It is in a tomato-cream sauce as opposed to the usual yogurt based sauce. 'Navratan' means 'nine gems,' so choose nine of the vegetable, nuts, and paneer ingredients; you can leave out the elements you don't want to use, or add them all so it is 'ten gems' if you wish.