Make the 1st filling: boil milk, margarine and sugar. After boiling add semolina. Cook for 10 minutes stiring. Add cacao at the end.
At the bottom of the form put tea biscuits. Pour hot cacao filling. Put tea biscuits on top. Then pour on it 2nd filling made the same way as the 1st (except cacao). Put third layer of biscuits.
Pour some chocolate glaze on top and sprinkle with desiccated coconut.