For a richer flavor, consider using dark brown sugar in the glaze. If you prefer a smoother sauce, you can strain the teriyaki glaze after it has thickened to remove the pineapple chunks. These meatballs can be made ahead of time. Simply bake the meatballs, then store them in the refrigerator until ready to use. Reheat in the teriyaki glaze just before serving. Spice it up by adding a pinch of red pepper flakes to the teriyaki glaze.