This recipe appears on the menu at Cameron's Contemporary American Cuisine as an entrée side dish
Ingredients:
9 Idaho® Potatoes, #90 ct. (5 lbs.)
1 lb. parsnips, peeled
1 qt. heavy cream
1 qt. half and half
1 cup horseradish root, grated
1 tablespoons kosher salt
1 tablespoon white pepper
Instructions:
Peel and slice potatoes 1/8" thick; slice parsnips 1/8" also.
In heavy-bottom saucepan, combine all ingredients. Bring liquid to boil, reduce heat to medium and simmer for 5 minutes to release potato starch and thicken cream slightly.
Press mixture into full-size 2" hotel pan.
Bake at 350°F until golden brown and potatoes test tender, about 40 minutes.