Preheat the oven to 350 degrees F (175 degrees C).
Combine maple syrup, ketchup, vinegar, sesame oil, olive oil, mustard, and sesame seeds in a medium-sized saucepan and bring to a simmer. Simmer sweet-and-sour sauce for about 5 minutes and set aside.
Combine green onions, egg, soy sauce, ginger, onion powder, black pepper, and garlic powder in a mixing bowl. Beat together until well mixed. Add ground turkey and top with panko bread crumbs. Mix well using your hands to combine all ingredients.
Use a standard cookie scoop to make uniform meatballs and place them in an even layer in an ungreased glass 9x13-inch pan. Place chopped carrots evenly between meatballs in the pan. Pour sweet-and-sour sauce evenly on top. Cover with aluminum foil.
Bake in the preheated oven for 30 minutes. Uncover and bake and additional 10 minutes.
