Preheat the oven to 200c/Gas6; arrange 8 or 10 muffin cases in a muffin tin
Place the ground pistachios and salt in a large bowl, then sift over the cornflour, baking powder and bicarbonate of soda and stir to blend
Whisk the eggs in a medium bowl until well blended, then whisk in the vinegar, oil and honey; pour over the dry ingredients and whisk until smooth; fold in the olives and spring onions
Fill the cases by two thirds; scatter over the cheese and bake for 17-20 minutes until risen and crusty; transfer to a wire rack and leave to cool
They will keep well loosely covered until the following day
8 servings