Pork and Green Onion Dumplings

Ingredients: 8 oz ground pork (not lean) 8 green onions, thinly sliced 1″ piece ginger, peeled and grated 2 tsp plus 2 tbsp soy sauce 1 tsp kosher salt, divided 1/2 tsp. freshly ground white pepper 24 3 1/2″-diameter wonton wrappers 5 tbsp unseasoned rice vinegar, divided 4 tsp all-purpose flour 4 tsp cornstarch 6–8…