4: Gather the pastry into a flat cake, wrap in plastic film and refrigerate for at least 2 hours (it is easy to make this pastry the day before you want to use it).
5: After this resting time, roll out the pastry and line the tart tins or moulds.
7: Squeeze 4 clementines and collect 50 à 60 ml of juice. Add 50 g caster sugar and melt the sugar over low heat. Be careful not to let it boil; the clementine juice should be just hot, around 122°F (50°C). Use a thermometer to be sure. Add the gelatin and mix in thoroughly.
8: Put the pan to cool by standing it in cold water. Stir from time to time with a whisk.