A case of what I call "stealth gluten"

Since I can tolerate a very limited amount of gluten (which celiacs and many gluten-sensitive people cannot), I occasionally cheat by eating the filling of a wrap or sandwich and leaving the wrap part or the bread behind.  But boy, was I unpleasantly surprised recently when I found croutons mixed into the tuna-salad filling.  Let the gluten-avoider beware!