Knead the flour, sweetness, egg and butter in pieces until smooth. Roll out the dough round (approx. 28 cm Ø) and line a greased tart tin (24 cm Ø) with it. Prick the base several times with a fork.
Cover and chill for about 30 minutes.
Bake in a hot oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for approx. 20 minutes. Take out, let cool down.
Stir the pudding powder and 5 tablespoons of nectar until smooth. Boil up the rest of the nectar. Bind with pudding powder. Leave to cool slightly and spread on the tart base. Chill for about 2 hours.
Sweeten the curd with sweetener. Whip cream until stiff and fold in. Spread the mixture on the tart. Cut 2/3 mango meat into slices, puree the rest. Spread both with passion fruit on the cream. Decorate with mint.