Mar 18, 2021 · Chicken tom yum soup is a fragrant Thai soup, based on a spicy, clear chicken broth. It’s star ingredient is the tom yum paste – a heady, hot and fiery blend of shallots, garlic, chillies and tomato puree, that is mixed with a variety of asian herbs and spices for full-on flavour. We’ve used a shop bought version to save time and money.