Arrange cucumber, radish and asparagus on noodles.
To arrange asparagus on each plate, distribute small pieces around edge; place two large asparagus pieces alongside fish and lay two more long pieces over them in a criss-cross pattern.
Arrange asparagus in a single layer on pan, and spray again.
Arrange asparagus on a platter and season with salt and pepper.
Arrange asparagus on top; garnish with tarragon.