Knead flour, 50 g sugar, baking powder, fat and egg yolk. Chill for about 1 hour
Grease 6 tartlet cups (12 cm Ø) and sprinkle with flour. Divide the dough into 6 equal pieces and press them into the moulds. Bake in a hot oven (electric cooker: 200 °C / convection oven: 175 °C/ gas: level 3) for 20 minutes. Turn out, soak the 3rd gelatine. Wash one orange, grate the peel, squeeze the juice. Peel the rest of the orange including the white skin. Cut out the fillets and collect the juice. Measure out 100 ml of orange juice. Mix with yoghurt, orange peel and 1 tbsp. sugar. Squeeze out the gelatine and stir into the cream over a mild heat. Keep cold until it gels slightly
Whip cream until stiff, fold in. Spread the cream over the tartlets. Cool for 1-2 hours
Peel the grapefruit including the white skin,
cut into slices and
quarter. Cupcakes with orange,
Cover with grapefruit and mint