preheat oven to 180C and line a 20cm/8" round baking tin
sieve the flour, baking powder, sugar and ground almonds into a bowl and mix well
Grind most of the pistachios almost to powder in a mortar and pestle or a coffee grinder, save some to decorate the cake
In another bowl whisk together the eggs, honey, yogurt,oil, zest of the orange and ground pistachios
Mix the wet ingredients into the dry ingredients and bring togetherbto form a batter
spoon cake batter into prepared tin and bake for 45-50 minutes or until a skewer inserted into centre comes out clean and the cake is golden
While the cake is cooling make the marmalade drizzle by heating the marmalade and water gently till marmalade melts and forms a syrup
pierce cake all over with a skerer and drizzle over the marmalade syrup
Make the icing glaze by mixing a tablespoon of the juice from the orange with icing sugar till you get a glaze about the thickness of double cream
Pour the glaze over the cake
roughly crush the remaining pistachios and toast in a dry pan for just a minute till golden and fragrant and tip out of pan immediately to stop them cooking. Sprinkle these on top of the cake