Egg yolks

These were used for a sweet pastry for tart cases. But in the kitchen we use yolks for so many things. Just of the top of my head we use them for ice cream, glazing, pastry, custard, chocolate tart, ganache, pommes duchesse, mayonnaise, hollandaise sauce, sabayon, cakes, parfaits, pates and I'm sure I've missed out a few obvious ones!