Bob's your uncle

This is a well used phrase. It is added to the end of sentences a bit like and that's it! For example if you are telling someone how to make that fabulous banoffee pie you just served them, you would tell them to boil the condensed milk for three hours, spread it onto a basic cheesecake base, slice bananas on top, add some whipped double cream, another layer of banana and Bob's your uncle!