Could this be it? Its listed right after the Blue Bayou Pork Loin.
http://www.mouseplanet.com/drr/drrrecipes.htm#potatoes
Blue Bayou Au Gratin Potatoes
This recipe was given out by Blue Bayou chefs.
Potatoes (baking) 3 lbs, peeled and thin sliced
Onion, thin sliced
Cream Sauce for the Potatoes
Manufacturing Cream (Heavy Cream) 2 cups
Whole Thyme (dry) 1/4 tsp.
Fresh Garlic (chopped) 2 tbs.
Salt 1-1/4 tsp.
Pepper 1-1/4 tsp
Butter 1 tbs.
Parmesan Cheese (grated) 4 oz
Mix onions and potatoes and put into baking dish. Mix cream, garlic, salt, pepper, and thyme leaves. Pour mixture over potatoes and onions and cover. Put in a pre-heated 350F degree oven, and bake for about one hour. When potatoes are tender, remove from oven and sprinkle with parmesan cheese. Put back in the oven uncovered and bake for ten minutes more until brown.