Start by washing and thinly slicing the cucumber into even rounds. I like to use a mandoline for consistent thickness. Lay the slices on paper towels and lightly sprinkle with salt to draw out excess moisture. After a few minutes, gently pat them dry to prevent soggy sandwiches.
In a mixing bowl, combine softened cream cheese with chopped dill, chives, and parsley. Add lemon juice, salt, and pepper, then mix until smooth and creamy. Taste and adjust seasoning if needed—it should be fresh, slightly tangy, and well-balanced.
Lay out your bread slices and trim off the crusts for a classic tea sandwich look. If using butter, spread a thin layer on each slice to act as a barrier. This step helps keep the bread from becoming soggy after adding the filling.
Spread a generous layer of the herb cream cheese mixture on each slice of bread. Arrange cucumber slices evenly on half of the bread slices, slightly overlapping them. Top with the remaining bread slices and press gently to hold everything together.
Using a sharp knife, cut each sandwich into halves or quarters—triangles or fingers work best. Wipe the knife between cuts for clean edges and a neat presentation. Serve immediately or chill slightly before serving for extra freshness.