Four cheese ravioli is a delicious pasta dish made with small squares of pasta dough filled with a mixture of four different types of cheese. Typically, the cheeses used are ricotta, mozzarella, parmesan, and either provolone or fontina. The ravioli are usually boiled and then served with your choice of sauce, such as marinara, Alfredo, or pesto. It's a rich and flavorful dish that is sure to satisfy cheese lovers!