In a mixing bowl, combine ground pork, chopped shrimp, green onions, soy sauce, sesame oil, grated ginger, minced garlic, and egg. Mix until well combined.
Place a teaspoon of the pork mixture in the center of each wonton wrapper. Moisten the edges of the wrapper with water, then fold in half to form a triangle. Press the edges to seal, making sure there are no air pockets.
In a large pot, bring chicken broth to a simmer over medium heat. Add sliced ginger, minced garlic, soy sauce, rice vinegar, and sesame oil. Let it simmer for 5-10 minutes to allow the flavors to meld.
Carefully drop the wontons into the simmering broth and cook for about 5 minutes, or until they float to the surface and are cooked through.
Add baby spinach leaves to the pot and cook for an additional 1-2 minutes, until wilted.
Ladle the wonton soup into bowls, garnish with chopped green onions, and drizzle with chili oil or sriracha if desired.