Bouquet garni:

bouquet garni: leek greens, bay leaf, celery, parsley & thyme, originally uploaded by cabanagirl.

OK These are the classic bouquet garni ingredients: leek greens (two 4 inch pieces, to be the outside pieces of the bundle , bay leaf, celery (one 4 inch piece with the leaves on), parsley (4 pieces including stems) & thyme ( 3 pieces)
This little bundle allows the flavors to infuse into the soup without becoming part of the soup.