Mayonnaise is an immensely important sauce and if I had to choose a single 'Desert Island' sauce, this would be it. It pairs perfectly with many different ingredients. Some books will terrify you with words of warning before you start making the sauce. Others are perhaps a little casual in their approach, all I will say, is to be a bit careful, take your time and just remember the important rules, as stated below. Once you have made it once or twice, making it won't cause you a second thought and by then you will realise that there is simply no substitute for the real thing. Let us be clear: there is no comparison whatsoever between mayonnaise from a shop bought jar and the real thing. If you use good eggs and oil, this sauce can transform the foods you serve with it.