Though they are similar, tamari and soy sauce are not the same thing. From Japan, tamari is made from fermented soy beans. Sometimes monosodium glutamate and caramel are added to tamari sauces. Soy sauce originated in China, and while it too is made from fermented soy beans, it often contains wheat and therefore gluten. Both sauces are barrel-aged for 18 to 24 months, and then pasteurized.
Looking to save time while preparing this recipe? Find the RICARDO Chicken Broth at IGA grocery stores.