1/4 Medium cantaloupe, cut into 12 thin slices
1 Medium cucumber, thinly sliced
24 slices Soft multigrain bread, crusts removed
1/2 tsp. Lemon juice
1 tsp. Dill weed
1 tbsp. Finely chopped red onion
1/2 cup Reduced-fat mayonnaise
1 pound Boneless skinless chicken breasts
1/4 tsp. Pepper
1/2 tsp. Salt, divided
1/2 tsp. Dried tarragon