The New Zealand Railways Magazine, Volume 12, Issue 8 (November 1, 1937)
French Onion Au Gratin
French Onion Au Gratin.
Grease a pie-dish, then fill it with alternate layers of cooked onion, grated cheese, and white sauce. Season well and sprinkle the top with grated cheese. Bake in a sharp oven till nicely browned, then serve as quickly as possible.