Peel and roughly chop the potatoes.
Heat the oil in a non-stick pan and add the chopped potatoes, 2 tbsp at a time. Press to flatten into potato rösti cakes and fry over a medim heat for 4-5 minutes on each side until golden brown.
Meanwhile, wash the herbs, shake dry and chop finely.
Wash, core and quarter the apple, and cut into thin slices.
Mix the herbs and apple pieces with the quark and season with salt and pepper.
Drain the fried rösti on kitchen paper and serve with the apple and herb quark.