Preheat oven 200°C.
Generously grease a 12-hole muffin tray with dairy-free spread.
Lightly dust your work surface with icing sugar and roll out the puff pastry block to a thickness of around 5mm.
Cut out 12 circles using an 8-cm round cookie cutter. Press these into the holes of the prepared muffin tray and prick the bottoms of each case lightly with a fork, then put the tray in the fridge to chill while you make the coconut custard.
Whisk the yogurt, sugar, cornflour together in a bowl.
Pour the coconut milk into a saucepan and stir in the vanilla extract. Heat over a low-medium heat, until simmering, removing it just when it starts to bubble around the edges of the pan; don’t let it boil.
Slowly pour the milk, in a steady stream, into the yogurt and sugar mixture, whisking constantly with a balloon whisk to combine. Once you have a smooth custard, return it to the pan and cook over a very low heat, stirring with a wooden spoon, until quite thick.
Next, remove the muffin tray from the fridge and pour the custard into the 12 pastry cases, try not to over fill them.
Using a small fine-mesh sieve, sprinkle a little cinnamon over the top of each of the tarts.
Bake on a high shelf in the oven for 25 minutes, or until the pastry is golden and the custard set.
Remove from the oven and leave to cool for 2 minutes in the tin,before transferring the tarts to a wire rack to cool.