1. Melt the butter in a large heavy-bottom saucepan over medium-high heat. When the butter is melted add the chopped onion and cook until almost translucent. Add a few grindings of black pepper and the minced garlic.
2. Just before the garlic starts to brown, add the rice and stir well. Keep stirring until the rice has absorbed most of the butter and the pan is almost dry.
3. Add the white wine and turn down the heat a notch. When the wine is almost absorbed, add 1/2 cup of stock. Stir frequently adding the rest of the stock in approximately 1/2 cup portions until the liquid is almost all absorbed. If the rice is still a bit hard, add any seafood juice from the packet or some hot water and cook until it is absorbed.
4. Add the lemon juice and stir for a few more minutes. Add the seafood and a bit more pepper.
5. Just before serving, stir in the parmesan and the parsley.
6. Serve up in bowls with some extra parmesan and a bit more parsley as a garnish.