1) Preheat oven to 160C/320F. Line a rectangle cake pan.

2) Combine butter and chopped baking chocolate over low heat until melted.

3) Remove from heat and set aside to cool.

4) Place eggs. brown sugar, and vanilla extract in a mixing bowl and beat till fluffy and add in the melted butter chocolate mixture, stir till well combined.

5) Add self rising flour, cinnamon, walnuts, and green apple, mix well and pour into prepared cake pan.

6) Bake in preheated oven for 40 to 45 minutes and leave cake to cool. Best to chill for at least one hour for easy spreading of the ganache cream.To make the chocolate ganache: bring the cream to just a boil over medium-high heat.

7) Add in the semi-sweet chocolate pieces and blend well till chocolate melts.

8) Whisk until creamy.

9) Let cool and spread onto cake.