Hummingbird cake

Name: Hummingbird cake
Ingredients: 250g/8¾oz plain flour; 250g/8¾oz caster sugar; 1 tsp ground cinnamon; 1 tsp bicarbonate of soda; 3 free-range eggs, beaten; 200ml/7fl oz sunflower oil, plus extra for greasing; 50g/1¾oz pecan nuts, roughly chopped; 50g/1¾oz walnuts, roughly chopped; 2 bananas, mashed; 1 large mango, peeled, stoned removed, flesh mashed; 2 passion fruit, pulp only; 85g/3oz tinned pineapple, mashed; 1 orange, zest only; 200g/7oz full-fat soft cheese; 50g/1¾oz unsalted butter, softened; 400g/14oz icing sugar