Hong Kong Egg Tarts (港式蛋挞)

The best tool for flattening pastry dough isn't a rolling pin but a plate. Just place a round blob of dough between two plastic sheets, then press it evenly with a flat-bottomed plate. Peel off the top sheet of plastic, then flip the dough into a tart mould.

Ease the dough into the mould, from the centre to the edges so that there're no air pockets. Trim the excess around the rim, and you're done. That's all there is to it. With this method, even a novice can quickly make pastry shells that are nicely thin and even. It is, for me, much faster and easier than how professional bakers do it. They just press a lump of dough into the mould without flattening it first.

Sieving the custard is necessary only when you plan to use it within a couple of hours. If you have time to let it rest half a day or longer, you can skip this step. Refrigerated, the egg and milk mixture may be stored for maybe one week.

A vanilla pod is good for flavouring the filling. Failing that, a high quality vanilla extract makes a reasonable stand-in. If vanilla is too vanilla for you, how about dark rum, brandy, kahlua or Bailey's? Hey, nutmeg is nice if you like nutmeg. Ginger juice would be appropriate if you're feeling windy.

On no account prick the tart shells to stop them from puffing up in the oven. If you do, they'll leak. Instead, prebake the pastry at a low temperature of 150°C and, if there isn't any air trapped underneath the dough, it should stay nicely flat even without pie weights. If you like, the tart shells may be chilled or frozen either before or after prebaking.

I like my egg tarts shiny, not matte. The shine comes from the slightly undercooked custard on top, which is done by giving the tarts less heat from the top than the bottom. And the heat has to be quite gentle, overall, so that the eggs and milk cook into a soft and silky smooth custard.

If photos and words are too abstract for you and you don't get the picture, here's my video to help you connect the dots:

HONG KONG EGG TARTS (港式蛋挞) Source: adapted from Aunty Yochana (Recipe for 20 tarts) Custard Filling 240 g eggs 160 g sugar   480 ml milk 1¼ tsp vanilla extract Tart Shells 125 g salted butter, softened 60 g icing sugar, sifted 15 g egg white 15 g egg yolk 1 tsp vanilla extract 210 g plain flour To make tart filling, whisk sugar with eggs till melted. Add milk and vanilla extract. Whisk till evenly mixed. Sieve to remove big bubbles, into something that can pour without dripping. Set aside till small bubbles subside, about 1¼ hours. To make tart dough, mix butter and icing sugar till smooth. Add egg white, yolk and vanilla extract. Mix till well combined. If dough is sticky, sprinkle with flour 1 tsp at a time and mix through. If dough is dry and crumbly, sprinkle with water instead 1 tsp at a time. Place dough in freezer till just firm, spread out to cool down faster. This should take 10 minutes or so. When lining tart moulds, remove dough from freezer ¼ portion at a time. To line tart moulds, smooth 2 plastic sheets so that there are no folds. Roll 30 g dough into a ball. Place ball between plastic sheets. Press evenly with flat-bottomed plate to form a circle 2 mm thick and 10 cm wide, checking thickness and evenness by touching dough with palm. Remove top plastic sheet. Place 8 x 2.5 cm tart mould on dough, rim side down. Flip mould, along with dough and remaining plastic sheet, to face upward. Press dough into mould, from centre to rim. Remove plastic sheet. Trim excess dough around edges. Run fingers round tart mould, gently pressing to even out thickness and remove air pockets if necessary. Trim again if there's excess dough. To bake tart shells, preheat oven to 150°C. Place shells on baking tray. Bake 15 minutes in middle of oven. Increase temperature to 180°C. Continue baking till slightly brown, another 5 minutes or so. Remove from oven. Leave on wire rack to cool down completely. To bake tarts, preheat oven to 165°C. If you want to line your baking tray with foil, it should be shiny side down. Pour custard into shells, to 2 mm from rim. Bake 15 minutes in bottom of oven. Reduce temperature to 150°C. Move tray to middle of oven. Top up filling to make up for evaporation. Bake till custard is just slightly wobbly in the middle when shaken, another 15 minutes or so. If custard puffs up during last few minutes but is still too watery in the middle, remove tarts from oven to cool down till custard subsides, then continue baking. Watch custard closely towards the end to make sure it doesn't overcook. Serve hot, or at least warm. Leftovers should be refrigerated. Tarts may be reheated at 120°C using bottom heat only for 10 minutes or so. Pastry isn't soggy at all if reheated without moulds.