This is from 'Book of Afternoon Tea' by Marika Hanbury Tenison.
List of Ingredients
White or brown bread, sliced thin
1 Hard boiled egg
1 oz Butter, softened
Salt and White Pepper
Cress
Instructions
Shell the egg and finely chop. Combine the chopped egg and softened butter in a bowl, season with salt and pepper and mix with a fork to obtain a soft, creamy mixture without destroying the texture of the chopped egg.
Spread the egg and butter mixture on the bread. Top with a generous layer of cress, cover with a second slice of bread and press firmly together.
Remove crusts and cut each sandwich into 3 finger sandwiches.