This version of Sarde a Beccafico is served with sautéed mushrooms that are flavored with garlic and parsley. The sardines are stuffed with a mixture of breadcrumbs, pine nuts, raisins, and parsley, and then baked in the oven until golden brown. The mushrooms are cooked on the stovetop until they are tender and flavorful, and are then served alongside the sardines. This dish is perfect for a flavorful and satisfying dinner.