Ella Mills’ Banana and Olive Oil Loaf

200g self-raising flour, sifted

1 tsp baking powder

3 very ripe bananas, mashed

4 tbsp coconut yoghurt

75ml olive oil, plus extra for greasing

1 tsp vanilla bean paste

100g prunes or medjool dates, chopped

1 tbsp ground flaxseed

75g sultanas or raisins