Halve the apples and pears, remove the cores, cut into segments with the skin left on, roughly chop the nuts, mix with the lemon juice and pear syrup, leave to steep for approx. 10 mins. Drain the fruit and nuts, retain the juice and set aside.
Sprinkle the pastry dough with cinnamon, roll with a rolling pin, prick firmly with a fork, transfer to a baking tray (approx. 30 cm diameter). Arrange the segments of fruit on top of the pastry so that they overlap a little, sprinkle with the nuts. Fold the pastry edges inwards slightly in a wavy design.
for approx. 35 mins. on the bottom shelf of an oven preheated to 200°C. Beat the cream with the reserved juice (2-3 tbsp) and the quark until stiff, refrigerate.
Beat the cream with the reserved juice (2-3 tbsp) and the quark until stiff, refrigerate.