For the sauce, mix 1 tablespoon milk and pudding powder until smooth. Bring the rest of the milk and 5 tablespoons of water to the boil. Stir in the pudding powder and bring to the boil. Let the sauce cool down
Cut the peaches into slices. Stir the curd and mineral water until smooth. Chop the pistachios and stir in half. Season to taste with sweetener
If necessary, cut out round slices of bread (approx. 8 cm Ø) or quarter them. (Bread remains may crumble and stir into the quark)
Spread the quark on a slice of bread. Place half of the peaches on top and cover with the remaining slice of bread. Decorate with the remaining peaches and possibly lemon balm. Sprinkle the remaining pistachios over it. Pour the chocolate sauce over it