It isn't too often that I think a crouton makes a salad complete. Maybe a crouton fully complements a Caesar salad, but even then I don't think that a crouton makes the salad complete.
But in this case, I truly think everyone will agree with me when I say that these croutons make this salad complete. Without them, the salad wouldn't be worth mentioning. It would only be spinach, cucumber, and a little balsamic vinaigrette salad dressing.
That being said, these "croutons" are a little more work than the average joe. I'll let you figure out if you think they're worth it. I certainly do!