If you are in Cusco, you can't miss the regional food. Head to the traditional "Quinta Eulalia," located inside a 19th-century house at the entrance of the San Blas neighborhood. The chefs here take full advantage of the local biodiversity, and they have perfected the art of mixing flavors.
Remember that the potato originated in this part of the world, and more than 400 varieties can be found here. Delicacies include ox tongue stew, roasted guinea pig, and kapchi, a dish made from a rare mushroom species that grows only during the rainy season. Something as simple as corn with cheese can turn out to be extraordinary because of the size of the corn and the unique flavor of the cheese.
Keep in mind that carbohydrate-heavy foods are popular in the Andes, so you can expect to have a few of them as sides. Don't miss the potatoes and quinoa here: they are not like the dishes you'll find anywhere else!