Sausage, Chestnut and Fennel Dressing

INGREDIENTS

• 1 box (16 oz.) focaccia stuffing
• 4 Tbs. (1/2 stick) unsalted butter
• 2 yellow onions, diced
• 4 celery stalks, diced
• 1 large fennel bulb, trimmed and diced
• 1/2 cup white wine
• 2 cups prepared French chestnuts, roughly
• chopped
• Salt and freshly ground pepper, to taste
• 1 1/4 lb. mild Italian sausage, casings removed
• 6 Tbs. chopped fresh flat-leaf parsley
• 3 to 3 1/4 cups chicken stock, warmed, plus
• more as needed