Bouquet garni of thyme, bay leaves, and sage, tied with a string.The bouquet garni [bukɛ ɡaʁni] (French for garnished bouquet) is a bundle of herbs usually tied together with string and mainly used to prepare soup, stock, and various stews.The bouquet is cooked with the other ingredients, but is removed prior to consumption.ouquet garni of thyme, bay leaves, and sage, tied with a string.