Place 4 of the egg yolks in a food processor or blender (discard the other 4) with the mayonnaise, cottage cheese, curry, mustard and pepper sauce. Process until smooth.
Spoon the filling into a pastry bag with star tip. Pipe the filling into the egg whites, then sprinkle with the paprika. Garnish with the parsley. Refrigerate, covered, until ready to serve.
Dining with the Duchess: Making Everyday Meals a Special Occasion by Sarah The Duchess of York Ferguson