Heat oven to 170C/gas 4. Line a 12-hole muffin tray with large muffin cases. In a jug, mix the eggs, yoghurt, oil, apple, banana, honey and vanilla. Tip the remaining ingredients, except the seeds, into a large bowl, add a pinch of salt and mix to combine.
Pour the wet ingredients into the dry, mix briefly until you have a smooth batter, don’t over mix as this will make the muffins heavy. Spoon the batter between the cases. Sprinkle the muffins with the seeds. Bake for 25-30 mins until golden and well risen, and a skewer inserted to the centre of a muffin comes out clean. Remove from the oven, transfer to a wire rack and leave to cool. Store in a sealed container and eat within 3 days.