Rhubarb spice cake with lemon sauce

Recently found ..to use some of the rhubarb flourishing in the garden...

Ingredients for the Cake:-
30g butter
200g caster sugar
1 egg
175ml milk
250g sifted plain flour
3 teaspoons baking powder
1 teaspoon salt
1 teaspoon ground cinnamon
1/2 teaspoon ground nutmeg
1/2 teaspoon ground cloves
250g rhubarb, cut into 1cm pieces

For the lemon sauce:-

400g caster sugar
4 tablespoons cornflour
600ml water
60g butter
2 1/2 teaspoons grated lemon zest
2 tablespoons lemon juice
1/4 teaspoon lemon extract

Method.
Preheat the oven to 180 C / Gas mark 4, Grease and flour a 22x33cm cake tin.
Sift together the flour, baking powder, salt, cinnamon, nutmeg and cloves and set aside.
In a large bowl, cream together 30g butter and 200g sugar until light and fluffy. Beat in the egg. Beat in the flour mixture alternately with the milk, mixing just until incorporated. Stir in the chopped rhubarb. Pour mixture into prepared tin.
Bake in the preheated oven for 45 to 50 minutes, or until a skewer inserted into the centre of the cake comes out clean. Allow to cool.

To make the Lemon sauce: In a saucepan, mix together 400g sugar and 4 tablespoons cornflour. Stir in the water. Cook over medium heat, stirring constantly, until mixture is thickened. Remove from heat and stir in 60g butter, lemon zest and lemon juice.
Serve with cake.