Follow the recipe to the letter the first time you make it. If you are adventurous enough to make au gratin potatoes, you will need to abide by a few ideas and tricks. Pretty much as good as those prepackaged potatoes are, why not strive grown-up au gratin potatoes, or Gratin Dauphinois, made from scratch with fresh elements. Once food rationing was instituted throughout World War II, macaroni and cheese grew to become a meals staple and a quick substitute for a meat and potatoes dinner. Ingred...