While searching for French-Canadian recipes, I found this one on the Saveur.com site. Here is what is stated about the recipe: "(Bagatelle) The typical bagatelle in La Beauce is a child's delight of Jell-O, white cake, and strawberry jam. We prefer this grown-up version, with fresh fruit, custard (instead of Jell-O), and a drizzle of marsala."
1For the custard: Mix together sugar and cornstarch in a large saucepan. Add egg yolks, and whisk to combine; then gradually whisk in milk. Cook over medium-low heat, stirring constantly, until custard thickens to the consistency of thick cream, about 25 minutes. Transfer to a large bowl, and add vanilla. Cover surface of custard with plastic wrap to prevent a skin from forming, and refrigerate until completely chilled, about 2 hours.
2For the trifle: Cut cake into 2'' X 1'' pieces. Arrange a layer of cake pieces in the bottom of a large trifle or glass bowl. Sprinkle cake with some of the marsala; then spread a layer of strawberry jam over the cake; then scatter some of the raspberries over the jam. Pour some of the custard over the berries. Repeat layering, ending with custard. Cover with plastic wrap, and refrigerate for at least 3 hours. Remove trifle from refrigerator about 1 hour before serving.
3Just before serving, put heavy cream and sugar into a large, well-chilled mixing bowl. Beat cream with a whisk or an electric mixer fitted with whisks until cream holds soft peaks. Do not overbeat. Decorate trifle with large dollops of whipped cream.