Winter roots cake

Ingredients

• 300 g grated carrots (or a mix of carrots and/or parsnips, an apple, squash)
• 140 g sultanas (or mix of sultanas, raisins and currants)
• 4 clementines or 2 oranges (zest and juice; and zest of lemon if you like)
• Pinch of salt
• 12 g mixed spice (two heaped teaspoons)
• 5 g bicarbonate of soda (1 teasp)
• 4 eggs
• 300 g self-raising flour
• 300 g soft brown sugar
• 5 g ginger or nutmeg (or mix of both)
• 200 g melted butter
• 200 g icing sugar (if liked)