Cut butter into pieces. Mix icing sugar, flour, egg yolk and butter first with the dough hooks of the hand mixer, then with your hands to a smooth dough. Wrap dough in cling film and chill for approx. 30 minutes. Cut aluminium foil into squares of about 16 x 16 cm. Roll out the dough on a floured work surface approx. 2 mm thin and cut out approx. 4 circles (approx. 15 cm Ø).
Knead the remaining dough again, roll out, cut out another 2 circles. Place the dough circles in the greased tartlet cups (12 cm Ø), press the edges firmly and prick several times with a fork. Chill the tartlets for about 10 minutes, then line with aluminium foil and fill with dried peas. Bake the Tartelettes in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 15-25 minutes. Wash, clean and halve the strawberries. Let the tartlets cool down a little, then remove peas and aluminium foil and remove the tartlets from the tartlets. Let them cool down on a cake rack. Roughly chop the chocolate and melt in a bowl over a warm water bath. Spread the tartelettes with chocolate, place the strawberries inside and sprinkle with the remaining chocolate.
Let the tartlets cool down a little, then remove peas and aluminium foil and remove the tartlets from the tartlets. Let them cool down on a cake rack. Roughly chop the chocolate and melt in a bowl over a warm water bath. Spread the tartelettes with chocolate, place the strawberries inside and sprinkle with the remaining chocolate. Then chill for about 30 minutes. Whipped cream tastes good with it