6 (5- to 6-inch long) bambino (also called Baby Bell) eggplants (about 6 ounces each)
1/2 cup long-grain or jasmine rice
1/4 cup olive oil
3 tablespoons pine nuts
1 large onion, finely chopped
2 garlic cloves, finely chopped
2 cups chicken stock or reduced-sodium chicken broth
1 (14 1/2-oz) can diced tomatoes in juice
3/4 lb ground lamb or beef chuck (not lean)
1 teaspoon ground allspice
1/2 lemon
3 tablespoons chopped flat-leaf parsley