5: Pour half the lemon dressing over and mix well.
6: Dice 500 g cooked potatoes and put in a bowl.
7: Pour the remaining lemon dressing over and mix well.
8: Add the potatoes to the cabbage and mix again. Your salad is ready.
Remarks
For the cabbage, try using a specific, local variety. Here in France that might be Pontoise or Douarnenez. If you like the contrast of hot and cold, reheat the diced potatoes before pouring the lemon dressing over.