Knead flour, 1 egg, 50 g sugar, butter and salt to a smooth dough. Wrap the dough in foil and chill for about 30 minutes
Wash the oranges, grate them dry, halve them and cut 8 thin slices from the middle. Turn orange slices in approx. 3 tbsp. sugar. Place the slices on a baking tray lined with baking paper and let them caramelise (golden, not black) in a preheated oven (electric cooker: 150 °C/ circulating air: 125 °C/ gas: see manufacturer) for about 1 hour. After half the baking time turn
Roll out the dough on a floured work surface. Cut out 6 circles (approx. 15 cm Ø) from the dough. Grease the moulds (approx. 12 cm Ø) and line with dough. Chill the Tartelettes for about 15 minutes
Peel some orange zests from the remaining oranges and put them in cold water. Squeeze the oranges. Mix 3 eggs, 120 g sugar, crème fraîche, 150 ml orange juice and liqueur and pour onto the shortcrust pastry bases. Bake the Tarteleletts in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see manufacturer) for 20-25 minutes until the cream has set
Remove the tartelettes, remove them from the moulds and let them cool on a cake rack. Before serving, decorate with orange slices and zests and dust with icing sugar if necessary