Put flour, 1/4 teaspoon of salt, butter in pieces and 1 egg in a bowl. Knead quickly to a smooth dough and cover and chill for about 30 minutes. Wash the basil and dab dry.
Put 1 stalk of basil aside for garnishing. Pluck the remaining basil leaves from the stems. Pluck 7 tomatoes with stalk from the panicle, wash and dab dry. Pluck the remaining tomatoes without stalk from the panicle, wash and pat dry.
Whisk 4 eggs and cream thoroughly, season to taste with salt, pepper and nutmeg. Roll out the dough into a circle (approx. 30 cm Ø) on a floured work surface. Place in a greased tart tin (26 cm Ø) sprinkled with flour, press the edge lightly.
Cut off any excess dough. Spread tomatoes without stalk in the form. Pour egg-cream into the mould. Put the tomatoes with the stalk upwards. Spread basil leaves on the egg-cream. Bake in the preheated oven (electric range: 175 °C/ convection oven: 150 °C/ gas: level 2) for about 35 minutes until golden brown.
Remove the quiche, allow to cool briefly and garnish with basil.