Wash the beetroot, drain and wrap in aluminium foil. Bake in a preheated oven (electric: 200 °C/ gas: level 3) for 1 1/4 - 1 1/2 hours. In the meantime, wash dill and chives, dab dry and chop finely, except for a little bit for garnishing. Cut cress from the bed with scissors.
Stir curd and milk until smooth and stir in the herbs, except for two tablespoons. Season to taste with salt and pepper. Cut the baked beetroot crosswise with a knife and press them apart. Arrange with quark on plates and serve sprinkled with herbs and garnished.