In skillet cook bacon until crisp;remove and crumble. Pour off all but 2 tablespoons drippings. Season beef with salt and pepper;shape into 5 patties and cook onion in drippings until tender. Stir in soup, sour cream, and paprika. Cover;cook over low heat 20 minutes. Stir now and then. Serve on bread with sauce.Garnish with bacon and additional sour cream. Makes 6 open-face sandwiches.