How do you improve on potato salad ... provides the salad with a smokiness and a savory note that lifts it from being ...

When cool, put in a bowl with the spring onions, apple ... assemble the salad, put a layer of the lettuce at the bottom of a large glass bowl. Top the lettuce with a layer of potato salad ...

Grate the apples on top. Wrap them in the tea towel and wring out any excess water. Tip the potato and apple mixture into a large bowl and stir in the crème fraîche and egg yolks until well ...