Mix the ingredients for the vinaigrette – olive oil, lemon juice, lemon zest, mayonnaise, honey and Dijon mustard. Season with salt and freshly ground pepper and shake or stir the vinaigrette together.
Cut the potatoes into bite-sized pieces and put them in a bowl with the peas and spring onions, then pour the vinaigrette over.
Tear the salad leaves roughly and toss them through the salad. Scatter with the pine nuts and serve straight away.
The salad is best freshly made, while the leaves are still crisp. If you need to make it ahead, I recommend waiting to toss in the salad leaves until just before serving – and ideally waiting to pour over the vinaigrette too.If the potato salad has already been mixed, I recommend taking it out of the fridge 20-30 minutes before serving.