Recipes and Cooking Meatball Sliders 3.8 (46) 1 Review Upgrade your appetizer game with these easy slow cooker Meatball Sliders. Keep the meatballs simmering all day and allow guests to build their own if the bash is an open house or all day affair. By BHG Test Kitchen BHG Test Kitchen The Better Homes & Gardens Test Kitchen has been in continuous operation for nearly 100 years, developing and testing practical, reliable recipes that readers can enjoy at home. The Test Kitchen team includes culinary specialists, food stylists, registered and licensed nutritionists, and other experts with Bachelor of Science degrees in food science, food and nutrition, or culinary arts. Together, the team tests more than 2,500 recipes, produces more than 2,500 food images, and creates more than 1,000 food videos each year in the state-of-the-art test kitchen. Learn about BHG's Editorial Process Published on June 14, 2011 Print Rate It Share Share Tweet Pin Email Photo: Blaine Moats Prep Time: 10 mins Cook Time: 4 hrs Total Time: 4 hrs 10 mins Servings: 24 Yield: 24 appetizers Jump to Nutrition Facts Ingredients 1 red onion cut into thin wedges (1 1/2 cups) 2 12 ounce package frozen cooked Italian meatballs (24) 1 24-26 ounce jar marinara or pasta sauce (about 2 1/4 cups) 1 tablespoon balsamic vinegar ½ teaspoon crushed red pepper 6 slices provolone cheese, quartered (6 ounces) 4 roma tomatoes, sliced 24 cocktail buns, split and toasted, if desired Directions Place onion wedges in a 3 1/2- or 4-quart slow cooker. Top with frozen meatballs. In a medium bowl combine marinara sauce, balsamic vinegar, and crushed red pepper. Pour over meatballs. Cover and cook on low-heat setting for 4 to 5 hours or on high-heat setting for 2 to 2 1/2 hours. Gently stir through mixture in cooker. Place a cheese and a tomato slice on the bottom of each cocktail bun. Top each with a meatball;replace bun tops. Rate it Print Nutrition Facts (per serving) 217 Calories 11g Fat 20g Carbs 10g Protein Show Full Nutrition Label Hide Full Nutrition Label Nutrition Facts Servings Per Recipe 24 Calories 217 % Daily Value * Total Fat 11g 14% Saturated Fat 5g 25% Cholesterol 24mg 8% Sodium 516mg 22% Total Carbohydrate 20g 7% Protein 10g *The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.