In a large bowl, combine cream cheese, walnuts, parsley, and bell pepper. Add onion, lemon juice, nutmeg, salt, and pepper; stir until well blended.
Spread one side of each piece of bread lightly with butter. Top the buttered side of 12 slices of bread with some of the cream cheese mixture and top with the remaining bread slices, buttered side down.
Carefully cut the crusts from each sandwich with a long, sharp knife. Cut the sandwiches in half diagonally and then cut in half again.
If desired, decorative shapes can be made with
cookie cutters.
Yields 12 whole sandwiches or 24 halves or 48 fourths.