Line and grease a
deep 20cm/8in round cake tin. Preheat the oven to
180 'C/350 'F /Gas 4. Sift the flour, baking powder
and spices into a bowl. In another bowl, cream the
butter and sugar with the lemon rind until it is
light and fluffy, then beat in the eggs. Fold in the
flour mixture, then the carrots, banana, raisins,
chopped nuts and milk.
Spoon the mixture
into the cake tin, level the top and bake for about
1 hour, until risen and the top is springy to touch.
Turn the tin upside-down and allow the cake to cool
in the tin for 30 minutes. Then turn out on to a
wire rack. When cold, split the cake in half.
Cream the cheese
with the icing sugar, lemon juice and orange rind,
then sandwich the two halves of the cake together
with half of the frosting. Spread the rest of the
frosting on top and decorate with walnut halves and
sugar.