Halupki (Stuffed Cabbage)

Name: Halupki (Stuffed Cabbage)
Prep time: 45 min
Cook time: 2 h 45 min
Total time: 3 h 30 min
Cuisine: Eastern European
Ingredients: 1 head cabbage, cored; water to cover; 0.25 teaspoon salt; 1.5 pounds lean ground beef; 1.5 pounds ground pork; 1.5 cups cooked white rice; 2 large eggs, slightly beaten; 0.25 cup finely chopped onion; 2 tablespoons chopped fresh parsley; 0.5 teaspoon garlic powder; 0.5 teaspoon salt; 0.5 teaspoon ground black pepper; 1 (28 ounce) can tomato sauce; 0.25 cup white vinegar; 2.6666667461395 tablespoons white sugar