"To make baked macaroni, you first have to make a very useful white sauce called béchamel (pronounced “bay-sha-mel”). To make it, you start by cooking a combination of butter and flour known as a roux (pronounced “roo”). Once you have learnt how to make béchamel sauce, you can use it in many other dishes, like lasagna. This sauce tastes quite plain to start with, so in this recipe, flavor is added with cheese...."