In a large Dutch Oven add the stock, carrot, scallions, ginger, garlic and soy sauce. 

Bring the broth ingredients up to a boil, then reduce the heat to simmer, covered for about 15 minutes. 

Meanwhile, heat a little sesame oil in a small nonstick skillet over medium heat and sauté the sliced shiitake mushrooms until they begin to take on some browning. Add about ½ teaspoon of fresh grated ginger to the mushrooms and add a light drizzle of soy sauce. Stir well and cut the heat, set aside. 

After the broth has simmered, covered for 15-20 minutes, strain the broth through a fine mesh sieve and discard the solids, return the strained broth to the pot. 

Increase the heat to bring the broth back up to a boil. Taste the broth and add more soy sauce as needed, to taste. Stir in a tablespoon of rice vinegar, then add the sautéd mushrooms and about 3 ounces of fresh baby spinach to the pot. 

When the broth is boiling again, reduce the heat to a high simmer and add the frozen wontons to the broth. Cover and cook the wontons for about 3-5 minutes. Test a wonton for doneness, and if they’re done. Cut the heat and it’s time to serve!