1 cup fine fresh bread crumbs (from 2 slices firm white sandwich bread)
1/3 cup whole milk
1 medium onion, finely chopped
3 garlic cloves, minced
1 medium celery rib, finely chopped
1 medium carrot, finely chopped
2 tablespoons unsalted butter
2 tablespoons Worcestershire sauce
1 tablespoon cider vinegar
1/4 teaspoon ground allspice
1/4 pound bacon (about 4 slices), chopped
1/2 cup pitted prunes, chopped
1 1/2 pounds ground beef chuck
1/2 pound ground pork (not lean)
2 large eggs
1/3 cup finely chopped flat-leaf parsley
Garnish: cooked bacon