Peel ginger and shallots and dice finely. Melt 25 g butter, sauté shallots and ginger in it. Dust with flour and sweat. 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.
Pour the brew through a sieve into a pot, bring to the boil again, remove from the heat, stir in crème fraîche, season with salt, pepper, lemon juice, sugar and cognac. Cut the lobster meat into small pieces. Heat 25 g butter in a coated pan. Fry the lobster meat for 2-3 minutes, turning it over, spread it on plates or bowls and fill it up with hot soup. Add 1/2 tsp. salmon caviar to each, sprinkle with coriander and garnish