Sausage Spinach Stuffing

Name: Sausage Spinach Stuffing
Ingredients: 1.25 pounds ciabatta bread; 2 Tbsp. olive oil; 1 pound fennel out of casings; 2 yellow onions diced; 4 celery stalks diced; 6 garlic cloves minced; Kosher salt; 1/4 cup fresh sage leaves tough stems discarded, minced, chopped; 1.5 cups chicken or turkey stock; 2 large handfuls fresh Italian parsley leaves, finely chopped; 3 eggs; 2 tablespoons unsalted butter, finely diced; 1/2 cup Loccatelli cheese