Apple cake

Ingredients

• 55ml olive oil
• ½ teaspoon ground cinnamon
• a knob of butter
• 1 teaspoon salt
• 100g polenta
• 200g plain flour, sifted
• 100g stale breadcrumbs
• 100g caster sugar, plus extra for dusting
• 500ml full-fat milk
• 3 large free-range eggs, preferably organic, beaten
• 100g runny honey
• 100g dried figs, chopped or torn up
• 100g raisins or sultanas
• 500g firm eating apples, peeled, cored and roughly diced
• zest of 2 oranges
• zest of 2 lemons