sliced ripe olives or pimento-stuffed sliced ripe olives (to garnish)
Instructions
Beat butter in processor until light and creamy.
Cut eggs in half; set whites aside.
Add yolks,shallots and lemon juice to butter and blend well.
Add watercress and ground red pepper.
Season with herb salt to taste.
Blend until watercress is just incorporated; do not overmix.
Spoon mixture into pastry bag fitted with star tip and pipe into reserved egg whites or carefully mound mixture into whites using a small spatula or spoon.