01 - In a mixing bowl, combine the softened cream cheese, mayonnaise, fresh dill, lemon juice, salt, and black pepper. Stir until the mixture is completely smooth and well blended.
02 - Gently fold the minced red onion into the cream cheese spread until evenly distributed throughout.
03 - Lay the thinly sliced cucumber on paper towels and pat dry to remove excess moisture, ensuring the sandwiches stay crisp.
04 - Spread a generous, even layer of the herb cream cheese mixture onto one side of each slice of bread.
05 - Arrange the dried cucumber slices evenly across four of the prepared bread slices, then top with the remaining four slices spread-side down.
06 - Gently press each sandwich and cut into halves or quarters. Serve immediately or cover and refrigerate for up to 2 hours before serving.