Three-Bean Soup with Turkey Meatballs and Dijon Mustard Dumplings

1 tablespoon butter

1 large onion , diced (2 cups)

1 large carrot , diced

2 sticks celery , diced

2 quarts beef stock

1/2 cup orange lentils

1/3 cup barley

1 can kidney beans, drained and rinsed

1 can roman bean s, drained and rinsed

1 recipe Turkey Meatballs, recipe follows Turkey Meatballs:

1 1/2 tablespoons extra-virgin olive oil

1 small onion , diced (about 3/4 cup)

2 cups dry broken-up white bread

1 cup milk

1 pound ground turkey meat

2 large egg s, well beaten

2 tablespoons freshly chopped parsley leaves

1/2 teaspoon salt

1/2 teaspoon freshly ground black pepper

1/2 cup golden raisins, hydrated in warm water

1/2 cup pine nut s, slightly toasted

Flour

1 cup vegetable oil