In small bowl, combine mayonnaise, mustard and dill; blend well. Spread mixture on 1 side of each bread slice. On 2 bread slices, spread side up, layer egg slices and asparagus; top each with second bread slice. Layer tomato slices, cheese and lettuce on each sandwich; top with remaining bread slices, spread side down. If desired, place 2 decorative toothpicks in each sandwich.