Preparation:
Prepare the dough
Place the flour, butter, egg and salt in a bowl and knead into a smooth dough. Wrap the dough in cling film and leave to rest in the fridge for 30 minutes.
Prepare the spinach
Heat the olive oil in a pan, add the garlic and fry briefly. Add the spinach and allow to collapse. Season with salt, pepper and nutmeg. Leave the spinach to cool slightly.
Make the filling
Whisk the eggs and cream in a bowl. Mix in the grated cheese and cooled spinach. Season to taste with salt and pepper.
Roll out the pastry
Roll out the dough on a floured work surface and cut out circles that are slightly larger than the cavities of a muffin tin. Press the dough circles into the wells of the muffin tin.
Filling
Distribute the spinach and cheese mixture evenly over the prepared pastry cases.
Baking
Bake in a preheated oven at 180 °C (top/bottom heat) for about 20-25 minutes until the quiches are golden brown.
Serving
Let the mini quiches cool slightly, remove from the tray and serve warm or at room temperature.