In large bowl, add 1 1/2 lb ground beef, 1 1/2 teaspoons salt, 1 1/2 teaspoons pepper, ¼ cup of A-Premium Dark Vinegar, 1/4 cup ketchup, 3 tablespoons Neapolitan Herb Balsamic Vinegar, 1 cup of breadcrumbs, and 2 eggs; use your hands to mix ingredients together. Set aside.