Slice cucumber into 1/4-inch rounds. In a small bowl, combine sour cream,
dried dill and pepper.
Place one teaspoon of the sour cream mixture on each cucumber slice.
Garnish each with about 1/2 teaspoon caviar and a dill sprig.
Cut bread slices with heart-shaped cookie cutter.
Butter and toast heart-shaped bread.
Place cucumber slices in center of serving plate and surround with toast hearts.