Cooking your own lobster ensures the best culinary experience. And here's how: take a six inch deep pan, put five inches of water in it and add enough salt to make an egg float. Bring to the boil, turn to simmer, and put the defrosted lobster in for 18 minutes. It's as easy as that. For a main course, less than 400g of lobster per serving would be stinting, 700g would be generous.