I have made pumpkin risotto with pumpkin puree and roast pumpkin, the roast pumpkin you stir through at the end the puree you add with the stock and it creates a creamy pumpkin risotto, really yummy topped with chicken kiev, passata and parmesan (or eggplant fritters passata and parmesan).

Truffle is like a parmesan mushroom flavour its the only way I can describe it.