Ciabatta and Sausage Stuffing

Name: Ciabatta and Sausage Stuffing
Ingredients: 3 tbsp. unsalted butter; 10 oz. bulk sweet or hot breakfast sausage, casing removed; 1 carrot, cut into 1/4″ dice; 1 small yellow onion, cut into 1/4″ dice; 1 stalk celery, cut into 1/4″ dice; 2 cups turkey or chicken stock; 1⁄3 cup olive oil; 2 tbsp. roughly chopped parsley, plus more for garnish; 2 tbsp. roughly chopped rosemary; 2 tbsp. roughly chopped sage; 1 (12-oz.) loaf ciabatta bread, cut into 1″ pieces; Kosher salt and freshly ground black pepper, to taste