Warm potato salad

Cut any large potatoes in half. Put the potatoes in a pan, cover with boiling water and bring back to the boil. Reduce the heat and simmer for 15–20 minutes or until the potatoes are just tender.

Meanwhile, make the dressing: whisk together the oil, vinegar, garlic, if using, sugar and seasoning.

Drain the potatoes and put them into a serving bowl. Add the walnuts, celery, spring onions and chopped parsley. Pour on the dressing and toss the ingredients together gently. Allow to cool slightly until just warm, then serve garnished with parsley.