Peel ginger and shallots and dice finely. Melt 25 g butter, sauté shallots and ginger in it. Add stock and white wine, bring to the boil and simmer for 4-5 minutes. Stir in soup paste. Continue to simmer for 1-2 minutes. Wash coriander, shake dry. Pluck the leaves from the stems and chop them, except for a little bit for garnishing.
Season the stock to taste with salt, pepper, lemon juice, sugar and cognac, pour through a sieve into a pot, bring to the boil again. Cut the lobster meat into small pieces. Heat 25 g butter in a coated pan. Fry the lobster meat for 2-3 minutes while turning it, spread it on plates or bowls, fill up with boiling stock. Add 1/2 tsp. salmon caviar to each, sprinkle with coriander and garnish