Old Fashioned Stuffed Cabbage Rolls

ngredients
1 medium head cabbage (3 pounds)
1/2 pound uncooked ground beef
1/2 pound uncooked ground pork
1 can (15 ounces) tomato sauce, divided
1 small onion, chopped
1/2 cup uncooked long grain rice
1 tablespoon dried parsley flakes
1/2 teaspoon salt
1/2 teaspoon snipped fresh dill or dill weed
1/8 teaspoon cayenne pepper
1 can (14-1/2 ounces) diced tomatoes, undrained
1/2 teaspoon sugar