In a large mixing bowl, add 3/4 cup of panko breadcrumbs and 1/3 cup of whole milk. Let the breadcrumbs soak for a couple of minutes. Then add 1 whisked egg, 1 tablespoon of soy sauce, 1 teaspoon of fish sauce, 1.5 teaspoons of grated ginger, 1 tablespoon of minced garlic, 1 teaspoon of toasted sesame oil, and salt & pepper to taste. Next, add 1.5 pounds of 80/20 ground beef and lightly fold it in without over mixing. Scoop out about 1.5 tablespoons of the mixture and roll it into meatballs. Bake the meatballs on a baking sheet lined with parchment paper at 400 degrees Fahrenheit for 15 minutes. For the sauce, to a pan add 1 & 1/4 cup of high quality sweet chili sauce, 2 tablespoons of rice vinegar, and 1 teaspoon of soy sauce. Let the sauce cook on medium-low heat for about 5 minutes. Then add in your meatballs and let them cook for another 5 to 10 minutes (using a smaller pan will help submerge the meatballs in the sauce). When serving, top them off with the sauce and thinly sliced green onions. Enjoy!