Fruit glaze is a common technique that is used to cover pastries, fruit tarts, and cheesecakes. It gives the fruit a shiny look, as well as adding a little bit of extra flavor. Fruit glaze also protects and preserves the life of the fruit on your dessert. Just heat jam or jelly (apricot is common) in a saucepan with a little bit of water to thin it out, and brush the mixture on your dessert with a pastry brush.