Add the whites from green onions to pan and cook another 3 minutes stirring frequently.
Add in half of the minced garlic and minced ginger to the pot and stir constantly for 1-2 minutes. Pour broth into pot, turn up heat to medium high and bring to a boil.
Make the meatballs
While waiting for soup to come to a boil, gently combine ground meat, soy sauce, sesame oil, red pepper flakes or Sriracha, rice wine vinegar, and remaining garlic and ginger in medium bowl.
Roll mixture into 20 even sized meatballs, about 1-1/2 to 2 tablespoons each. Once soup comes to rapid boil gently drop in meatballs one by one until all have been added.
Turn heat back down to medium and cook 15 minutes. Taste and add salt & pepper if needed.
Cook the noodles
Cook according to package directions and divide into 4 serving bowls.
Finish & Serve
Divide soup among 4 bowls; 5 meatballs and about 2 cups of broth per bowl. Garnish with green onions, cilantro, and Sriracha! Enjoy!
Notes
You can make the meatballs ahead of time!Mix and roll the meatballs up to 24 hours ahead of time. Still add them to the soup one at a time so they're not all over each other.You may need to add an extra cup of broth or water if you boil for longer to make up for lost liquid.You can have dumplings and noodles! Dumpling wrappers can be found in most grocery store. Just follow the package directions for filling and folding. Cook them them the same way in the soup as you would the meatballs.