Pre-heat oven to 350°. Make sandwiches of bread, butter, and jam.
Cut sandwiches into quarters and arrange loosely in a greased 9" x 12" baking pan. Mix milk, eggs, and sugar well, and pour over sandwich quarters. Generously sprinkle top with sugar and bake 30-40 minutes until the custard is set and the top crust looks golden brown.
Serve with vanilla ice