I have an obsession with food, always. This is part of the essential part of my travels and it is a deal breaker for anyone who wants to travel with me. I eat a lot, sometimes a lot of weird stuff, and often the restaurant or food stall is hidden on some back alley street. I hate going to typical tourist restaurants and seek out the cheap and characterful places. It also helps to have an iron stomach, especially if you are game for raw stuff.
Part of the popular dishes in South America is cerviche. Raw seafood cooked in lime juice and other sauces. I had it in Bolivia, Chile, Ecuador, Easter Island, Peru.
The best cerviche I ever had was in the most unlikely place that is a little far away from the coast. That was in Nazca, Peru, famous for the Nazca lines. It was cheap and so good for only us$5 for a complete meal that included a soup, the cerviche, main fish dish, a drink.
Every country prepares their cerviche a little differently.
Bolivia serve mostly fish cerviche with fried toasted corn and lotsa lime and chilli. Ecuador loves their cerviche with conche and prawns served with panacones (fried banana chips) and pop corn. Chile has their sea urchin cerviche which is delicious but expensive, serve plain with lime and onion. Easter island has mainly tuna cerviche, serve plainly like the Chileano version with lotsa lime juice. Peru has one of the best cerviches, mainly fish with some spices and mint.
I have the Travel Lust - photographing one place at a time 
Love your blog. Just wanted to let you know for the sake of accuracy, it’s ceviche, not cerviche. And, oh, it’s Machu Picchu, not MaNchu. (machu is old, picchu is mountain in Quechua).