The day before for the quinces, wash the lemons hot, peel the skin thinly. Squeeze the lemons. Cut the vanilla pod lengthwise and scrape out the pulp. Wine, 500 ml water, sugar, cinnamon, vanilla pulp
Peel the quinces, cut out the core. Poach the quinces covered in the boiling stock at low heat for about 30 minutes, turning the quinces several times. Let the quinces cool down overnight.
The next day, divide the chocolate into pieces and melt with cream in a hot water bath. Finely chop the pistachios. Lift quinces out of the stock, drain and arrange on four plates. Pour chocolate sauce over the quinces, sprinkle with pistachios.