In a medium-sized mixing bowl, combine the beef, egg, onion, 3 cloves of garlic, ½ teaspoon of ginger, breadcrumbs, scallions, basil, 1 tablespoon of soy sauce, and 1 tablespoon of fish sauce. Do not over mix.
Take a 1 ½ inch diameter cookie scoop and scoop the meatball mixture into balls. Place them onto a parchment-lined sheet pan and roll into perfect spheres.
In a medium-sized mixing bowl, whisk together the rest of the garlic, ginger, soy sauce and fish sauce. Add the rice vinegar, 1 teaspoon of sesame oil, Sriracha, honey, ketchup, and pineapple juice.
In a small mixing bowl, whisk together the corn starch and water.
In a large sauté pan, heat 1 teaspoon of sesame oil and the avocado oil over medium-high heat. Add the meatballs and sear until browned on one side, about 2 minutes. Flip each one over and cook for one minute, then turn the heat down to medium-low and add the soy sauce mixture. Cook for 6 minutes, then add the corn starch mixture and cook until thickened, about 1 minute, then turn off the heat.