Ingredients:

• 1 red onion cut into thin wedges (1 1/2 cups)
• 2 12 ounce package frozen cooked Italian meatballs (24)
• 1 24 ounce jar marinara or pasta sauce (about 2 1/4 cups)
• 1 tablespoon balsamic vinegar 1
• /2 teaspoon crushed red pepper 6 slices provolone cheese, quartered (6 ounces)
• 4 Roma tomatoes, sliced
• 24 Cocktail Buns, split and toasted, if desired (BREADWORKS’ Slider buns work great for this)

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 a low-heat setting for 4 to 5 hours or on a 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. (www.recipe.com)