Wash the thyme, shake dry and finely chop the leaves of 3 stems. Peel the shallots and cut them lengthwise into thick slices. Heat the oil in a pan, fry the shallots slices in it in portions while turning them, remove them. Crumble Roquefort into pieces. Mix eggs, chopped thyme and cream, season with salt, pepper and nutmeg.
Roll out the puff pastry and cut it into 8 squares of the same size. Grease the tartlet cups (approx. 8 cm Ø) with lift-off base and line with dough. Fold in the protruding edges and press firmly
Spread shallots and cheese into the tartlets. Pour egg cream over the top and bake on the middle shelf in the preheated oven (electric range: 200 °C/ convection oven: 175 °C/ gas: level 3) for 20-30 minutes. Cover the last 10 minutes of the tartlets with aluminium foil to prevent them from getting too dark.
Remove the tartlettes from the oven, let them cool down a little and remove them from the tartlets. Sprinkle with thyme leaves and coarse black pepper and serve