Heat the stock in a pan and simmer gently. In another pan heat the oil and butter, add the onion and cook for 4 minutes, until soft. Add the rice and stir for 2 minutes or until the rice is transparent. Stir in a ladleful of the hot stock, and a little wine. When all the liquid is absorbed, add a further ladleful of stock and wine. Continue adding the stock and wine, until the rice is cooked and has a creamy consistency. Add the salmon, basil, pine nuts, sun dried tomatoes and Parmesan. Season well and serve.