For a hearty side dish, make Ree Drummond's Perfect Potatoes au Gratin recipe from The Pioneer Woman on Food Network. Sharp cheddar and green onions. Mar 28, Potatoes Au Gratin are a classic potato side dish that you can make more easily than you may think! Creamy homemade white sauce with. Ordinary ingredients become extraordinary when combined in this casserole. Thinly sliced potatoes and onion are layered in a creamy cheese sauce creating the perfect au gratin potato recipe. TESTED & PERFECTED RECIPE - Potatoes Au Gratin is the ultimate comfort food with sliced potatoes, heavy cream & grated cheese. The indulgence is worth it!. Vote for your favorite scalloped/au gratin potato recipes. thehappypotatoes.com strives to present the best au gratin and scalloped potatoes recipes first so you.