For the Stuffed Cabbage
Make the stuffed cabbage: Bring a large pot of salted water to a boil. Add cabbage head, and cook until outer leaves are just tender, 3 to 4 minutes. Remove with a slotted spoon. Peel outer layer of leaves, and drain. Return remaining cabbage to water, and repeat until all leaves are cooked and removed. Pat each leaf dry with a kitchen towel. Select 12 large light-green leaves. Reserve remaining leaves for another use.
Preheat oven to 375 degrees. Using 2 forks, gently stir together beef, pork, rice, onion, parsley, paprika, and 1 tablespoon salt.
Working with 1 leaf at a time, trim thick part of rib with a paring knife, leaving leaf intact. Arrange about 1/2 cup filling (less for smaller leaves) in center of each leaf. Fold stem end of cabbage over filling. Fold in sides of cabbage. Carefully roll cabbage over to form a package, overlapping ends to seal. Transfer each, seam side down, to a large, shallow baking dish.
Spread sauce over stuffed cabbage leaves. Cover with parchment-lined foil, and bake until cooked through and cabbage is tender, about 1 hour.