Step 1: In a small bowl, combine the softened cream cheese, fresh dill, chives, lemon zest, salt, and white pepper. Mix until smooth and well combined.
Step 2: Slice the English cucumber into very thin rounds using a mandoline or a sharp knife. Lay the slices on a paper towel and pat them dry to remove excess moisture.
Step 3: Lay out the bread slices and spread a very thin, even layer of softened butter on one side of each slice. This acts as a barrier to prevent the tea party sandwich recipe from becoming soggy.
Step 4: Spread a generous layer of the herbed cream cheese mixture over the buttered side of three bread slices.
Step 5: Arrange the cucumber slices on top of the cream cheese, slightly overlapping them to cover the entire surface.
Step 6: Place the remaining three bread slices on top, buttered side down, to close the sandwiches.
Step 7: Using a sharp serrated knife, carefully trim off the crusts from all sides of the sandwiches. Cut each square into three even rectangular ‘fingers’ or four small triangles.
Step 8: Serve immediately or cover with a damp paper towel and plastic wrap until ready to plate your tea party sandwich recipe.