Method

Preheat the oven to 180 °C. Prepare a 13 x 35 cm loose-bottomed rectangular tart pan.

Chocolate pastry
Combine the butter and sugar in a blender and, with the motor running, add the whole egg and the egg yolk. Add the flour and cocoa powder and blend until it forms a dough. Wrap in plastic wrap and refrigerate for 30 minutes.

Press the pastry into the prepared pan and bake blind for 10 minutes (no need to use baking paper and beans).

Glacé ginger
Slice the peeled ginger as thinly as possible. Place the ginger into a saucepan and cover with water. Bring to a boil. Reduce the heat and simmer for 10 minutes. Drain and repeat. Place the sugar, water and salt into a saucepan and add the ginger. Cook until the liquid is the consistency of thin honey and the ginger is transparent. Remove from the heat and carefully scoop the ginger out of the liquid. Place the strips on a cooling rack and keep to one side to dry overnight.

Chocolate ganache
Melt the chocolate in the microwave and heat the cream slightly. Add the cream to the chocolate and combine gently with a whisk. Pour a 1-cm thick layer of ganache into the prepared tart pan. Layer generously with the glacé ginger and cover with the rest of the ganache. Keep to one side until set.

Serve with vanilla or chocolate ice-cream.