Take a large bowl. Beat eggs on medium high speed. Add sugar 1 tbls at a time and beat continuously till all the sugar finished and eggs and sugar mixture double in volume..

Mix green colour in the eggs mixture while beating then fold flour 1 tbls at a time. Avoid over mixing. Pour in square tin and bake at 180° for 20 to 25 minutes approx.

Check if wooden skewer comes out clean then it's done. Take it out from tin Let it cool completely then cut it in half. Spread strawberry jam and cover it again.

For Lemon Curd: cook butter and sugar together when sugar dissolved then add egg yolks and mix quickly.cool it. Then pour it in the piping bag.

Beat chilled whipping cream till whipped. Sieve icing sugar.

Mix water in icing sugar add blue colour spread warm on cake. Ones it's sets then spread cream on it evenly.

Now decorate pastries with lemon curd piping, strawberry jam and whipped cream.

Decorations is all your choice. I am using these three lemon curd, strawberry jam and whipped plain cream.