the short, crazy-easy way to do this consists of only 2 ingredients. 1 (32 oz) bag of pre-made, homestyle meatballs (do not get the "italian" kind.... it will taste all weird), and 1 (24 oz) bottle of pre-made teriyaki sauce. now, under normal circumstances, i would use HOME-MADE TERIYAKI SAUCE, however, if you're short for time, or just lazy, you can use this bottled stuff. just add fresh minced garlic, some sesame seed oil, and sesame seeds.... and you're good to go.
cook down the teriyaki sauce for another hour on medium-high, until thickened, then pour this sauce over the meatballs. the sooner you serve them, the better.