Clean and wash the spring onion and cut into rings except for one. Wash the lime, grate dry, finely grate the peel and squeeze the juice. Stir curd, sour cream, lime peel and juice until creamy and season to taste with salt and pepper.
Fold in onion rings. Peel the potatoes and grate them coarsely on a rasp. Mix flour and egg with the potatoes. Season with salt and pepper. Heat 4 tablespoons of oil in a pan one after the other.
Bake 16 small potato pancakes from the dough in portions and keep warm. Cut the remaining spring onion crosswise and halve lengthwise. Fry briefly in hot oil. Serve the potato pancakes with quark. Garnish with spring onion.