01 - In a mixing bowl, combine the softened cream cheese, mayonnaise, fresh dill, lemon juice, salt, and black pepper. Stir vigorously until the mixture is completely smooth and well blended.
02 - Gently fold the finely minced red onion into the cream cheese mixture until evenly distributed throughout the spread.
03 - Lay the thinly sliced cucumber pieces on a sheet of paper towels and pat them dry, removing any excess surface moisture to prevent the sandwiches from becoming soggy.
04 - Using a spatula or spoon, spread a generous, even layer of the cream cheese mixture onto one side of each slice of bread.
05 - Arrange the dried cucumber slices in an even, overlapping layer on top of the spread on half of the bread slices.
06 - Place the remaining bread slices on top of the cucumber layers, spread-side down, and gently press each sandwich together to adhere.
07 - Using a sharp knife, cut each sandwich into halves or quarters. Serve immediately, or cover tightly and refrigerate for up to 2 hours before serving.