Pani ca' Meusa, also known as Vastedda, is a popular street food in Palermo, Sicilia. It consists of a soft sesame seed bun filled with sautéed veal spleen, lung, and trachea, seasoned with lemon juice, salt, and pepper. The combination of tender meat and tangy flavors creates a unique and satisfying taste. Pani ca' Meusa is a must-try for adventurous eaters visiting Sicilia.