Wash, peel and coarsely grate the potatoes. Add lemon juice, eggs and flour. Season with salt, pepper and nutmeg. Wash thyme, pluck off leaves, leave some for decoration.
Mix the remaining leaves into the potatoes. Leave to stand briefly. Clean, wash and quarter the radishes. Clean, wash and cut the spring onions into fine rings. Clean, wash and drain iceberg lettuce and pluck into bite-sized pieces.
Cut the salmon ham into strips. Mix quark, cream and horseradish, fold in vegetables, season with salt and pepper. Heat oil in a pan. Fry 8 potato pancakes one after the other from the potato mixture and keep warm until everything is fried.
Arrange salad leaves on plates. Place a pancake on each plate and spread 1/4 of the quark cream on top. Cover with remaining pancakes. Arrange ham strips with thyme leaves on top.