Potatissallad med rökt öring och senapsdressing

👩‍🍳 Gör så här

1. 1
   Put the potatoes in a saucepan of lightly salted water and bring to the boil. Simmer for 10 mins or until tender, then drain. When cool enough to handle, peel and cut into thick slices. Put in a bowl and toss with vinegar and some seasoning.
2. 2
   To make the dressing, mix all the ingredients together in a small bowl. Pour over the potatoes and add the dill, capers and onion. Arrange the salad on plates with a handful of watercress, then top with the smoked fish.