We fell in love with these custard tarts on our anniversary trip after eating them every day. The flaky, buttery crust, mixed with a creamy, lightly cinnamon-spiced custard is an amazing combination.
Have a small cup of water nearby. Dip your thumbs in the water, then straight down into the middle of the dough spiral. Flatten it against the bottom of the cup to a thickness of about 1/16 inch, then smooth the dough up the sides. The pastry bottoms should be thinner than the tops.