01 -
Whisk the cranberry sauce, chili sauce, and brown sugar in a bowl until mostly smooth. A few cranberry lumps are fine.
02 -
Spread the frozen meatballs in a single layer in a 9x13 baking dish. Pour the sauce over and stir to coat every meatball.
03 -
Cover tightly with foil and bake at 375°F (190°C) for 25 minutes. This heats everything through and starts the sauce bubbling.
04 -
Remove the foil, stir gently, and bake another 15-20 minutes until the sauce is thick and sticky.
05 -
Let them sit for 5 minutes so the glaze sets. Serve warm with toothpicks.