In a spacious mixing bowl, thoroughly combine the ground beef (or turkey), breadcrumbs, grated Parmesan cheese, beaten egg, garlic powder, onion powder, salt, and black pepper. Use your hands or a spatula, mixing gently until the ingredients are just blended. Avoid overmixing to ensure tender meatballs.
Shape the mixture into meatballs, approximately 1 to 1.5 inches in diameter. Arrange the formed meatballs in a single layer inside your slow cooker to ensure even cooking.
In a separate mixing bowl, whisk together the cranberry sauce, BBQ sauce, and Worcestershire sauce until the mixture is smooth and well blended.
Carefully pour the cranberry BBQ sauce over the meatballs in the slow cooker, ensuring that each meatball is generously coated with the sauce.
Cover the slow cooker, adjusting the heat setting to low for 4-6 hours or high for 2-3 hours. Cook until the meatballs are thoroughly cooked and tender throughout.
Once the cooking time is complete, sprinkle the freshly chopped parsley over the meatballs for a touch of color and flavor before serving.
Notes
Transfer the meatballs to a decorative serving bowl and provide toothpicks for easy enjoyment. Drizzle some of the cooking sauce over the top and sprinkle additional parsley for visual appeal.