How to Make It
Whisk together grape jelly, chili sauce, barbecue sauce, mustard, Sriracha, salt, and pepper in a medium bowl. Lightly coat slow cooker with cooking spray. Place frozen meatballs in slow cooker. Pour jelly sauce over meatballs, and toss to coat. Cover and cook on HIGH until sauce is thickened, 2 to 2 1/2 hours, stirring halfway through. Top with chives, and serve immediately.