Add grape jelly, chili sauce and frozen meatballs to your crockpot and cook on low for 2 hours, stirring occasionally.
Serve directly from your crockpot, set to warm. Offer toothpicks, a slotted spoon or tongs for serving.
Remember, the meatballs are already cooked so you just want to heat them, not overcook them. Once the meatballs are heated all the way through to the center, then you can turn your crockpot down to keep warm until you’re ready to serve them.