Add all of the ingredients for the Sweet & Spicy Sauce to a small bowl and whisk to combine. Set aside until ready to use.
In a bowl, combine all meatball ingredients. Season with salt and pepper.
Using a cookie scoop or your hands, form equal-sized meatballs out of the meatball mixture.
Heat two to three tablespoons of oil over medium-high heat in a large skillet. Allow the oil to heat up for a few minutes, until it is sizzling hot.
Carefully place the meatballs on the surface of the hot skillet in a single layer and sear for 2 minutes. Flip meatballs to the other side and brown for another 2 minutes.
Pour half of the sauce into the skillet. Reduce the heat to medium and allow the meatballs to continue cooking, flipping once or twice, until they have reached your desired level of doneness, about 2-3 minutes, or until the sauce has thickened.
Transfer the meatballs to a serving platter and drizzle the remaining sauce on top. Sprinkle with green onions and sesame seeds. Enjoy!
To Bake in the Oven: Preheat oven to 375˚F. Line two large baking sheets with foil and coat with oil. Place the meatballs on the lined baking sheet in a single layer. Bake meatballs for 18 to 20 minutes, turning halfway through and brushing with half of the sauce, or until they are completely cooked through. Allow meatballs to rest for 5 minutes before transferring to a serving platter and drizzling the remaining sauce on top. Sprinkle with green onions and sesame seeds. Enjoy!