Preheat the oven to 200°C/400°F/Gas 6 and lightly grease a bun tray.
Put the flour and butter into a bowl, rub the butter in until the mixture resembles fine breadcrumbs.
Mix in the sugar.
Add the egg and enough water to just bring the dough together - a little at a time is best.
If time allows, shape into a round, wrap in cling film and chill in the fridge for 30 minutes.
Remove from fridge, turn onto a lightly floured board and roll out to approx 3mm deep.
Using a 7-8 cm cookie cutter, cut the dough into rounds. Put the rounds into the prepared bun tin and prick each with a fork.
Bake in the preheated oven for around 10 minutes.
Remove from the oven and place a teaspoon of your preferred jam or curd into each. Return to the oven for a further 10 to 15 minutes until pastry is nicely golden brown.
Remove from oven and allow to cool in the tin for 5 minutes and then transfer to a wire tray to cool.