Blend cream cheese and mayonnaise in a blender until smooth, scraping down the sides as necessary.
Combine the cream cheese mixture with cucumber, dill, pepper and garlic salt. Mix well.
Spread the mixture on top of 12 pieces of bread, garnish with dill sprigs and cover with remaining 12 slices of bread to create sandwiches. Cut into triangle halves or into triangle quarters.
Serve and enjoy!
