Tiramisu Toast

1 . Stage

Preheat the oven to 375 degrees F (190 degrees C). Line a baking pan with aluminum foil.

2 . Stage

Crack egg into a baking dish. Add white sugar, espresso, and vanilla extract. Whisk to combine. Place bread slices into the dish and toss in the mixture to saturate; let sit for 10 to 15 minutes to fully absorb.

3 . Stage

Transfer bread slices to the prepared pan and drizzle any accumulated coffee mixture liquid over top.

4 . Stage

Bake toast in the center of the preheated oven until custard is cooked and bread bounces back slightly when touched, 20 to 25 minutes. Transfer slices to a wire rack to cool to room temperature.

5 . Stage

Meanwhile, pour wine into a saucepan. Add sugar and cook over medium heat until reduced to about 1 tablespoon. Remove from heat and let cool.

6 . Stage

Place mascarpone cheese into a bowl and add cooled wine reduction and a very small pinch of salt. Stir with a spatula until combined. Chill before piping or spreading on cooled toast. Top with shaved chocolate.