Peel and chop the onion. Clean, wash and halve the tomatoes. Seed the tomatoes. Dice the flesh. Mix with sour cream, quark and onion. Season to taste with salt and pepper
Peel, wash and finely grate the potatoes. Mix with egg and flour. Season potato mixture with salt and pepper
Heat 2-3 tablespoons of oil in portions in a coated frying pan. Bake 12 thin, golden-brown buffers from the potato dough, one after the other
Clean and wash the salad. Mix vinegar, salt, pepper and sugar. Fold in 2 tablespoons of oil. Mix the salad with the marinade. Wash the chives and cut into small rolls, except for a little bit for garnishing. Arrange buffer with lettuce and tomato cream. Sprinkle with chives and garnish