Spinach Artichoke Dip in a Bread Bowl

Name: Spinach Artichoke Dip in a Bread Bowl
Ingredients: 1 round loaf sourdough or country bread, 6 to 7 inches in diameter; 2 tablespoons butter; 1 medium shallot, finely chopped; 1 clove garlic, minced; 1 pinch crushed red pepper flakes; 1 pound chopped frozen spinach, thawed; One 15-ounce can quartered artichoke hearts, drained; 6 ounces cream cheese, cubed; 1 cup shredded mozzarella; Kosher salt and freshly ground black pepper; 3 tablespoons grated Parmesan; Assorted crudites, for serving