Peel and chop the shallots. Heat butter and paste. Sauté shallots in it. Sweat flour with. Stir in 3/4 l water, stock, wine and 200 g cream, bring to the boil. Simmer for about 5 minutes while stirring.
If necessary, drain the crayfish and put them on skewers. Whip 200 g cream until semi-stiff. Season soup with lemon juice, salt, pepper, some sugar and Pernod. Serve with cream, dill and crayfish.