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.
Making Sandwiches Ahead of Time:
If you need to make tea sandwiches in advance and need to keep them from drying out, cover them loosely with a sheet of wax paper and then place a damp kitchen towel over the wax paper (never place a damp towel directly on top of the bread because the sandwiches will become soggy). Refrigerate.
When ready to serve, remove from refrigerator. Uncover sandwiches just before serving.
* Choose the best-quality white or wheat bread as possible. Never serve end slices. Freezing the bread before cutting and then spreading makes for easier handling.
Walnut Tea Sandwich Recipe: https://whatscookingamerica.net/sandwich/sandwichwalnut.htm