Place the vegetable stock in a large pot and bring to a boil.Add the noodles, shoyu, sugar, onion powder, garlic powder, ground ginger, and wakame flakes and cook for 3-4 minutes or until the ramen noodles are soft.Pour a ladle-full of stock into a bowl and add the miso*, whisk until smooth and then pour back into the stockpot.Stir in a few handfuls of baby spinach leaves until wilted.Ladle into bowls and garnish with scallions. Serve as is or with additional accompaniments as suggested above.