In a small bowl, combine mayonnaise and adobo sauce.
Spread half the mayonnaise on bread slices and top with lettuce and hard-boiled eggs.
Spoon remaining mayonnaise over eggs and evenly divide the shrimp.
Garnish with cucumber, lemon and dill.
To serve as a sandwich, serve one open-faced sandwich per person. To serve as an appetizer, remove the crust and cut each slice of bread twice diagonally to create four triangles per slice of bread.