Step 1

For the orange curd: Whisk together the granulated sugar, eggs, orange zest and juice, lemon juice and salt in a medium saucepan. Place over medium-low heat and cook, whisking constantly, until the mixture thickens to the consistency of a pudding, 7 to 8 minutes. Remove from the heat and stir in the butter a couple of cubes at a time. Set aside to cool.

Step 2

For the trifle: Beat the heavy cream to stiff peaks in a large bowl with an electric mixer. In another bowl, stir together the mascarpone, confectioners' sugar and liqueur. Gently fold the mascarpone mixture into the whipped cream.

Step 3

Dollop a quarter of the cream mixture on the bottom of a 3-quart trifle dish. Cover with a layer of ladyfingers, breaking them up if necessary to cover the bottom of the dish entirely. Spread a third of the curd over the cookies. Cover with about 1/2 cup of the raspberries, spreading them evenly. Dollop and spread one-quarter of the cream mixture on top of the raspberries. Repeat the layers of cookies, curd, raspberries and cream mixture 2 more times, ending with the cream mixture (the layers will depend on the size and shape of your dish; you might have more or less layers). Chill the trifle for at least 1 hour and up to overnight.

Step 4

When ready to serve, decorate the top of the trifle with the orange slices and remaining raspberries.