Melt half the butter in a saucepan and cook the onion gently until it becomes translucent. Pour in the white wine. Add the Arborio rice, stir, then add just enough chicken stock to come up to the level of the rice. Leave to cook on a slow heat. Mix the Excellence Cooking Cream and the Parmesan shavings gently until they start to melt. Add the truffle. Season with salt and pepper and add the remaining butter to bind the whole.
Mix the curly parsley and the vegetable stock in a blender. Bring the parsley juice to the boil with the Excellence Cooking Cream. Season with salt. Beat the mixture with a hand whisk until it becomes frothy.
Melt the butter in a saucepan. Fry the truffle, then add the port. Turn the heat down and leave to reduce. Add the veal stock and leave to reduce.
Pour the olive oil into a frying pan. Season the sea bass with salt and pepper. Sear the sea bass on both sides until it starts to brown. Place the dish in an oven preheated to 200°C for 6 minutes. Heat the parsley cream sauce, the Périgueux sauce and the truffle risotto. Place risotto in a pasta dish, arrange the Parmesan shavings on top. Blend the butter into the Périgueux sauce. Coat the sea bass with the Périgueux sauce and place on top of the risotto with the melted Parmesan. Add the parsley cream sauce just before serving.