Mix flour with salt in a food processor. Add cold butter and start pulsing. Add 2 to 3 tablespoons ice water, one tablespoon at a time, until dough forms into a ball. Gather up and pat into a ball. Refrigerate dough for 30 minutes before rolling out.

Meantime prepare cauliflower rice by breaking apart the cauliflower into large florets with your hands. Transfer the cauliflower to a food processor and process in 1-second pulses until it breaks down into grains.

Stir fry the sliced zucchini, pepper and "cauliflower rice "(you have just made) in a pan with little olive oil to prevent sticking (about 7-8 minutes). Add salt and turn off the heat. Set aside.

Crumble the feta with hands and in a separate bowl beat the eggs. Add a pinch of salt and pepper.

Take the dough put of the fridge, roll it out on a floured surface into a 10-inch circle. Carefully place dough in pie plate, fit loosely and then press into place. Crimp for a decorative crust. Heat oven to 200C/fan 180C/gas 6.

Lightly prick the base of the pastry with a fork then fill with baking beans. Blind-bake the pastry for 10 mins, remove the paper and beans. At this point take it out of the oven, add some feta cheese over the base, scatter over 1/2 of the veggies/cauliflower mixture, pour over the egg, then finally scatter over the rest of the cheese, leek and veggies. Bake for 20-25 mins until golden brown. Leave to cool down for at least 15 minutes, scatter with your favorite herb and serve in slices.