Alternatively:
You will need:
one clean guinea pig
onion
ground chili pepper and ground red chili pepper (both very spicy)
cooking oil
parsley
oregano
mint
huaycatay (an herb that tastes and smells like a blend of black mint and marigold)
walnuts
salt
butter.
The recipe, obviously not one for the beginning cook, instructs you to open the guinea pig ventrally, then to salt and drain it. After salting and draining, remove the organs and intestines, but do not wash the cuy anymore. Parboil the innards separately, then pierce them and dress them with onion, chili pepper, and oil. In another container, prepare a finely chopped mixture of the parsley, mint, oregano, huaycatay, walnuts, and salt. Combine the mixture with the cooked organs and intestines and stuff all that back into the body cavity of the guinea pig. Coat the guinea pig with butter and ground red pepper. Place the critter in a roasting pan and cook it in the oven ?until it?s done.?
http://www.moreintelligentlife.com/story/how-to-eat-a-guinea-pig
