01 -
Toss the frozen meatballs into a 5-quart or bigger slow cooker, then pour in the chili sauce and grape jelly. Stir it all together so the sauce covers all the meatballs.
02 -
Put the lid on and let it cook until the meatballs are hot all the way through and the sauce gets a bit thicker. You can cook it for about 2 to 2½ hours on HIGH or 3 to 4 hours on LOW. Want thicker sauce? Take the lid off for the last 30 minutes and turn it up to HIGH if you need to, giving it a stir now and then.
03 -
You can leave them in the slow cooker to stay warm while serving, or put them in a nice dish. Toss some parsley on top if you want.