To make these meatballs, start by preheating your oven to 425 F.
Next, line a baking sheet with parchment paper and set aside.
Then, prepare the meatballs. Add all of the meatball ingredients (the ground chicken, panko breadcrumbs, egg, garlic powder, cumin, kosher salt, and ground black pepper) to a bowl. Use your hands to mix the ingredients until they're fully combined.
Divide the meat mixture into 16 evenly-sized meatballs and use your hands to roll them into shape. Place the meatballs on the baking sheet and repeat until all of the meatballs have been formed.
Transfer the baking sheet into the oven and allow the meatballs to bake for 12-15 minutes.
While the meatballs are baking, prepeare the sauce. Add all of the sauce ingredients (the soy sauce or coconut aminos, rice vinegar, coconut sugar, chicken broth, pineapple juice, tomato paste, and cornstarch) to a large bowl or measuring cup. Whisk until fully combined.
Set the sauce aside while you prepare the stir-fry. Heat a large skillet, on the stove, over medium-low heat, and add in the avocado oil.
Dice the onion and bell peppers and, once the skillet is hot, add them to the pan and sauté them in the oil for approximately five minutes, until the veggies begin to soften and cook through.
Once the meatballs are done, remove them from the oven and transfer them to the skillet with the peppers and onions.
Pour in the sauce and sauté for another 3-4 minutes, until the sauce gets nice and thick.
Finally, add in the fresh pineapple and toss to combine.
Once the sauce is thick and the veggies are cooked through, remove the meatballs and stir-fry from the heat.
Serve over fresh rice, garnish with fresh chopped green onions, and enjoy!