For the shortcrust pastry, put all the ingredients in a bowl and knead until a homogeneous dough is formed. If necessary, add some mineral water if the dough is too dry. Let the dough rest in the refrigerator for 30-60 minutes before processing.
For the filling, cut the carrots into thin slices and sauté them in a little oil in a pan for a few minutes. Preheat the oven. For the quark mixture, carefully mix all the remaining ingredients in a mixing bowl with a hand mixer.
Grease a tart pan and line it with the shortcrust pastry. Put a few tablespoons of quark filling on the bottom, then distribute the carrots on the bottom and top with the rest of the quark filling. Knock the mold a few times on the work surface so that the carrots and quark filling are optimally distributed.
Bake the quiche at 180 degrees for about 45 - 55 minutes on the middle rack.