Preheat oven to 150c fan oven
In a large mixing bowl, mix together the sugar and oil
Add the eggs one at a time and mix
Mix in your grated carrot and fruit and nut mix
Squeeze in the juice of one orange
Sift in the self-raising flour and bicarbonate soda
Add the cinnamon and nutmeg
Give a good mix with a wooden spoon and spoon into a lined loaf tin
Oven bake for 1 hour 15 minutes
Check with a wooden skewer that it's cooked (the skewer will come out clean)
Meanwhile, make your frosting by whisking together the mascarpone cheese, icing sugar, and vanilla essence
When your cake is cooled, spread it on top, finish with a sprinkle of chopped walnuts
