Step 1: Prepare the Wontons

1. Make the Filling: In a mixing bowl, combine ground pork, chopped shrimp (if using), soy sauce, sesame oil, grated ginger, scallions, and cornstarch. Mix thoroughly until well combined.
2. Fill the Wontons: Place a small teaspoon of the filling in the center of a wonton wrapper. Wet the edges with water, fold into a triangle, and press to seal. Bring the two bottom corners together and pinch to create a classic wonton shape. Repeat with remaining wrappers and filling.

Step 2: Prepare the Broth

1. In a large pot, bring the chicken or pork stock to a gentle simmer.
2. Add soy sauce, sesame oil, grated ginger, and sliced shiitake mushrooms. Simmer for 10-15 minutes to infuse the flavors.
3. Add chopped bok choy and cook for 2-3 minutes until tender.

Step 3: Cook the Wontons

1. In a separate pot, bring water to a boil. Add wontons in batches, ensuring they don’t stick together. Cook for 3-5 minutes or until the wontons float to the surface.
2. Remove the wontons with a slotted spoon and transfer them to serving bowls.

Step 4: Assemble the Soup

1. Ladle the prepared broth over the cooked wontons in each bowl.
2. Garnish with fresh scallions and a drizzle of sesame oil, if desired. Serve hot.