Tip the ingredients, except the water into a food processor and pulse the mixture three or four times until it gets to the breadcrumb stage. Next add two to three tablespoons of cold water and process until the mixture comes together in a ball.
Form the pastry into a flat round shape and roll out to cover the base and sides of a 22cm/8inch loose bottom tin.
Lightly fork the base and chill for 30 minutes.
Preheat the oven to 200C/400F/180FAN/Gas6.
Place the baking tray in the oven.
Line the pastry with baking parchment and add baking beans.
Place the quiche on the preheated baking tray. Cook for 15 minutes. Remove the beans and paper and cook for another 5 minutes.
Remove from the oven and reduce the heat down to 180C/350F/160FAN/Gas4.
For the filling
Heat a frying pan over a medium heat and add the bacon for a few minutes until cooked through. Drain on kitchen paper.
Whisk the eggs and milk together and season with salt and pepper.
Scatter the bacon and cheese over the pastry base and top with sliced onions
Pour over the egg mixture and sprinkle the parsley over the top.
Bake for about 30 minutes until well risen and golden on top.
Allow to cool in the tin for 5 minutes before turning out.
Notes
📖 Variations
Try 100g of poached or smoked salmon, broken into pieces with 100g of chopped broccoli.
Cooked shredded chicken with canned sweetcorn.
Sliced softened onions with sliced tomato or softened leeks with thyme.
For a vegetarian option try chopped peppers, broccoli, green beans, spinach or mushrooms with cheese. Lightly cook the vegetables first.
Prawns or shrimps, crab or smoked fish also work well.