Potato salad with horseradish-mustard dressing

1.Place potato in a large saucepan, cover generously with cold salted water, bring to the boil over high heat and cook until tender when pierced with a skewer (15-20 minutes), then drain and transfer to a container.

2.Meanwhile, combine onion, garlic, lemon juice and rind in a bowl and stand until onion changes colour (5 minutes). Add remaining ingredients, season to taste, stir to combine, and toss through warm potato. Set aside to cool, then refrigerate until required.