Pour the oil in a small saucepan and heat over medium heat. When the oil is hot, add the garlic and saute for 30 seconds. Then add the chili sauce and grape jelly and mix together. Cook for 10 minutes on medium heat, stirring frequently.

Place the frozen meatballs in your slow cooker. Add the spices to the sauce mixture, stir and then pour it over the meatballs. Cover and cook for 1 ½ - 2 hours on high, or until the meatballs are hot and the sauce is bubbly. Stir once after 1 hour.