Banana and apple crumble muffins

Method

1. Heat the oven to 170°C fan/gas 5. Line the muffin tin with 12 cases. Whizz all the ingredients for the crumble together in a food processor until they clump together when squeezed, then set aside.
2. Sift the flour, baking powder and bicarbonate of soda into a mixing bowl, then add the oats and sugar, whisking to combine. In a separate bowl, lightly whisk the egg, vanilla, buttermilk and oil. Pour the wet mixture into the flour mixture and stir gently with the whisk, just to combine (don’t overmix). Fold in the apple and banana.
3. Divide the mixture between the cases (I use an ice cream scoop to make sure they’re all equal). Use your fingers to squeeze the crumble mixture together into clumps and scatter over the muffins.
4. Bake the muffins on the middle shelf of your oven for 20-22 minutes until a skewer inserted into the centre comes out clean. Serve warm or cold with yogurt and fresh fruit (if you like).