Shape these tiny meatballs, then freeze for up to 3 months. There's no need to thaw before using; they will cook quickly right out of the freezer.
Frozen mini meatballs can also be used in soup or sauce: Simmer meatballs, covered, in liquid until cooked through, about 10 minutes. For equal-size meatballs, scoop out meat mixture with a teaspoon, using 2 scoops for each meatball. Then roll between your palms to shape into balls.