Easy Udon Miso Noodle Soup : 1 cup water, 3 cups chicken or vegetable stock, 1/2 cup mushrooms, thinly sliced, 2 cups baby spinach leaves or baby bok choy, 12 ounces fresh udon noodles, cooked according to package directions and drained, 5 scallions, diced &amp; 2 tablespoons white miso paste.. Pin  it for directions !!