Cut the lobster lengthwise and remove all the meat, chop the leeks, garlic and sauté in butter, roughly cut the lobster meat in cubes and toss on low heat with the leeks. Increase the heat and add the white wine than cream, simmer and fill the lobster tail on an oven tray. Sprinkle with cheese and grill in the oven. In a deep pan put the lobster head and add the roughly chopped onions, garlic, celery and sauté on low heat in butter until butter is browned than add the wine and a glass of water. Simmer for 45min than blend and strain to obtain a clean bisque. For the gnocchi, mix well all the ingredients together until a dough consistence season and roll in a long sausage on dusted flour. You may add more flour to the potato mix if it`s too soft to roll. Cut the potatoes in small gnocchi and shallow fry just before serving.