Roast Turkey Breast with stalks

1 tablespoon butter 1 onion , diced 3 scallions , chopped (or shallots) 3 garlic cloves 3 stalks celery , diced 3/4 cup dry sherry 1 cup French bread, diced 1[...]

1 whole turkey breast , with bone and skin 2 cups chicken broth 2 cups dry white wine 3 carrots , coarsely chopped 4 stalks celery , coarsely chopped 1 onion[...]