For the compote, peel, quarter, core and chop apples. Caramelise 2 tablespoons of sugar in a pot at medium heat until golden brown. Deglaze with apple juice, add apples and cinnamon. Bring to the boil and simmer for about 10 minutes, stirring in between.
For the buffers, peel, wash and finely grate the potatoes. Peel onion and grate finely. Mix potatoes, onion, egg, 1 pinch of salt and flour.
Heat the clarified butter in portions in a large pan and bake about 16 buffers in succession. For this, put 2-3 tbsp. of potato mixture per buffer in the pan (a total of 3-4 buffers per pan) and fry for 3-4 minutes on each side until golden brown. Keep the finished potato pancakes warm. Serve with apple compote and sprinkle with 2 tbsp. sugar.