Blueberry Syrup

1. Put all the cake ingredients into a blender.
2. Whizz until they start sticking together.
3. Pour mixture into a 15cm x 15cm (6 inch) dish lined with baking paper.

Icing

1. Place the icing sugar in a small bowl.
2. Add lemon juice and mix to a thick paste (too runny and it will slide off the cake).
3. Spread the icing over the cake.
4. Put the cake in the freezer for at least an hour to firm up.
5. Cut into 10 squares and enjoy.