Dashi is a Japanese broth that serves as the base of soups and stews such as miso soup or ramen. It usually contains only two ingredients – shiitake mushrooms and (for the method I like to make) seaweed. And water. There are a handful of possible variations of this broth and my favourite combination uses the seaweed kombu. I’ve listed some of the health benefits of consuming both shiitake mushrooms and kombu below.