1 small yellow onion, sliced
2 medium carrots, chopped
1 large stalk celery, sliced
6 anchovy fillets, packed in oil
2 large bay leaves
3 large quail, partridge, dove, or other meaty little bird
2 cups dry white wine
1 to 2 cups chicken stock, or as needed
1 cup extra-virgin olive oi
ΒΌ cup white wine vinegar
3 tablespoons finely chopped fresh Italian parsley
2 tablespoons chopped drained capers
Salt and freshly ground black pepper