Calf’s kidneys with Garlic and Parsley

‘The word “trifolati” originally indicated the addition of truffles (from the Piedmontese “trifola”, meaning truffle). As the truffle is a rare - and expensive - commodity the word has assumed a secondary, more popular meaning - denoting that something is fried together with butter, garlic and parsley. However, if you do happen to come across some truffles, you could add a couple of slices to this dish, which would enhance the flavours immeasurably.’