Watercress and Smoked Salmon Tea Sandwiches

With a sturdy spoon, mix cream cheese and smoked salmon in a small bowl using back of spoon to mash salmon against sides of bowl. Cut crusts off bread and trim slices to form rectangles. Place 8 slices on work surface; reserve remaining 4 slices. Spread 2 tablespoons cream cheese mixture on each slice. Top with watercress, evenly divided. Top each of 4 prepared slices with another prepared slice. Cover with reserved bread (you'll have 4 triple-decker sandwiches). With short side of one sandwich near you, insert 4 evenly spaced toothpicks 1/2 inch from edge down left side of each sandwich and 4 toothpicks 1/2 inch from edge down right side (see Cooking Lesson, above). Using a serrated knife, slice sandwich in half lengthwise between picks, then between picks again, to form 8 tea sandwiches, each held together with picks. Repeat with remaining sandwiches.