In a food processor pulse the flour, salt and sugar to combine. Then add the butter, and pulse until the mixture resembles very coarse breadcrumbs (this should only take a few seconds).
Add the egg yolk, and pulse until combined. Check the mixture – if it’s starting to clump a little and holds together when you pinch it, it’s good to go. However, if it’s still too dry, add a little ice cold water and pulse again for a few seconds, adding tiny increments of water until the mixture starts to hold together.
Dump the mixture onto your kitchen bench and lightly bring it together into a ball – don’t knead it though. Flatten the ball slightly so it forms a disc, then wrap it tightly in plastic wrap and refrigerate for two hours.
Dump the mixture onto your kitchen bench and lightly bring it together into a ball – don’t knead it though. Flatten the ball slightly so it forms a disc, then wrap it tightly in plastic wrap and refrigerate for two hours.
Once chilled, roll out the pastry on a lightly floured surface to a 3mm thickness. Use to line a 28cm tart ring placed on a baking sheet (I allow the pastry to lie over the edges while it cooks; then I trim the top once it’s baked – this helps to avoid shrinkage).
Rest the lined tart ring in the fridge for 20 minutes (personally, I think it needs longer in the fridge – I left it for 2 hours. That way, when it hits the oven, it will be less likely to shrink).
Line the tart ring with greaseproof paper and fill with baking beans to keep the base’s shape, and bake blind for about 20 minutes.
Remove the greaseproof paper and baking beans and return to the oven for 5-8 minutes or until the pastry starts to turn golden brown.
Remove from the oven and allow to cool (you may like to brush the pastry with a little egg yolk to create a seal).
Turn the oven down to 160°C (320°F).