Preheat the oven to 350 °F (180 °C), 325 °F fan (160°C fan)
Grease and line 9" round spring form cake baking tin.
First prepare the topping. In a bowl mix the chopped hazelnuts, sunflower seeds, coconut and sugar and set aside.
Peel, core and slice the apples into small pieces and set aside.
In a bowl whisk together the spelt flour, baking powder, bicarbonate of soda, cinnamon and salt and set aside.
In a electric hand or stand up mixer whisk the sugar and the eggs for about 5 min, add the olive oil and vanilla and mix for 2 more min.
Add the dry ingredients to the mixture and mix until just combined.
By hand gently fold in the apples and blueberries.
Spoon the mixture into your prepared tin, level the surface, sprinkle with your prepared topping and bake for about 40 min or until a cocktail stick comes out clean.
Remove from the oven once ready and leave to cool down.
Place on a cake stand and enjoy!
Store in a fridge for up to 3 days.
