Answer
A Muslim is allowed to eat the food prepared by a non-Muslim who is not from Ahlul Kitãb [for example, a Hindu or a Buddhist], provided that he does not know or is not sure that the non-Muslim touched the food with wetness; and provided that he does not know or is not sure that the food consists of what is forbidden to him like intoxicating drinks. As for meat, fat and their extracts, there are specific rules that will come later on.