Boil the lemon

• Place the whole lemon in a saucepan of water and bring to a boil.
• Boil for 5 minutes, then drain and let cool slightly.
• Cut the lemon open and remove the seeds.

Blend the batter

• Add the lemon, sugar, vanilla sugar, salt, eggs, milk and oil to a blender.
• Blend until completely smooth.

Add the dry ingredients

• Add the flour and baking powder to the lemon mixture.
• Mix until just combined and smooth.

Bake the cake

• Pour the batter into a greased loaf pan.
• Bake at 160 °C for 1 hour, until a skewer comes out clean.
• Let the cake cool completely.

Make the glaze and finish

• Mix the powdered sugar with the lemon juice until smooth.
• Spread the glaze over the cooled cake.