Step 1

Combine the tarragon, 1/4 teaspoon salt and pepper; rub over chicken. Place on a baking sheet coated with cooking spray.

Step 2

Bake at 350° for 20-25 minutes or until a thermometer reads 170°. Cool to room temperature; thinly slice.

Step 3

In a small bowl, combine the mayonnaise, onion, dill, lemon juice and remaining salt; spread over 12 bread slices. Top with cucumber, chicken, cantaloupe and remaining bread. Cut sandwiches in half diagonally. Serve immediately.