Although this recipe uses an ingredient found in the Asian food section of the supermarket, it has a markedly Latin American flavor. I didn't have a marinade one day, so I did a search of the cabinets and this is the result. It can easily be multiplied for big groups, even made ahead. If you can't find chile oil, it can be made by heating red pepper flakes in a neutral oil, then allowing the mix to cool and straining the oil.