Place the slices of dough next to each other and allow to thaw. Bring 3/4 l milk, 1 pinch of salt, butter and cinnamon stick to the boil. Mix 2 tablespoons of milk, flour and corn flour and stir into the boiling milk. Simmer for 3-4 minutes while stirring until the mixture thickens.
Add 50 g sugar. Remove the cinnamon stick. Leave to cool a little.
Rinse the tartlet (approx. 12 cm Ø; e.g. with the bottom lifted out) in cold water. Put in dough slices and press the edges of the dough. Cut the edges straight, prick the base several times with a fork.
Separate eggs. Whisk egg yolk and flavour. First mix with 3 tablespoons of milk cream, then with the rest of the cream. Beat the egg whites until stiff, then add 75 g sugar. Fold in.
Brush into the moulds. Bake in the preheated oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for approx. 10 minutes. Then turn down the temperature (electric oven: 175 °C/recirculating air: 150 °C/gas: level 2) and continue baking for 12-15 minutes.
Mix 2 tablespoons of sugar and cinnamon, sprinkle over the tartes and serve warm.