Au Gratin Potatoes With Heavy Cream. Potatoes au gratin are possibly one of the top 10 comfort foods in the world. If you prefer, you can omit the thyme or substitute.

When it comes down to it, the main difference here is cheese. Serve garnished with parsley, if desired. Au gratin potatoes are typically sliced around ¼ inch thick to allow the cheese and cream to soak into the potatoes.