Cooling/Resting Time: 0 minutes
Beat softened cream cheese with electric mixer for 2 minutes until fluffy.
Fold in mayonnaise, chives, parsley, dill, lemon zest, lemon juice, and garlic. Season with salt and pepper to taste.
Slice cucumber very thin using sharp knife or mandoline, about 1/8 inch thick.
Pat cucumber slices dry with paper towels.
Spread herb cream cheese generously on one side of each bread slice.
Layer cucumber slices on half the bread slices, overlapping slightly to cover.
Top with remaining bread slices, cream cheese side down.
Press gently to seal sandwiches.
Trim crusts if desired and cut into halves or quarters.
Serve immediately to prevent soggy bread.