We did this on our first day in Arequipa. I have to admit I've done cooking experience in Thailand so I had high expectations and I wasn't exactly sure what Peruvian food entailed....little did I know it was a feast of potatoes and lots of cheese. For the lactose intolerance not exactly a greatest experience.
Food aside it was a great way to spend the morning we had an opportunity to visit the market and learn about the food. The instructor was very kind of letting us try different types of fruits that we don't get.