Add the chili sauce and grape jelly to a slow cooker. Stir to combine.
Add the meatballs and stir to coat.
Cover and cook on low for 4 hours. Serve as an appetizer or over rice as a main dish.
Video
Notes
We prefer homestyle meatballs but any variety will work fine here.I'm a sucker for the classic grape jelly meatballs, but these are also very popular with canned cranberry sauce in place of the jelly.You'll find chili sauce near the ketchup in a glass bottle. We use Heinz brand, but the store brand will work fine too.