This mixture is creamy, though no cream is used, and more delicate than a pâté.
Melt the butter gently in a small saucepan. Pour the butter into a food processor with the prawns and the yogurt. Whizz thoroughly until smooth. Turn the mixture into a mixing bowl and season to taste with the grated nutmeg and chilli powder and a little salt. Slice the salmon up into small pieces. Put four rounded teaspoons of the salmon pieces on one side, and cover with clingfilm. Stir the r