SMOKED TROUT AND POTATO SALAD

Steps:

• Soak the onion slices in a bowl of ice water. Cover the potatoes with water in a pot; add a pinch of salt, cover and bring to a boil. Reduce to a simmer and cook, uncovered, until tender, 8 to 10 minutes. Drain and let cool slightly; pat dry.
• Meanwhile, whisk the creme fraeche, vinegar, olive oil and mustard in a large bowl to make a smooth dressing. Stir in the dill. Drain the onion, pat dry and add to the dressing. Add the potatoes and cucumber, season with salt and pepper and toss to coat.
• Divide the watercress among 4 plates and add some potato salad to each. Flake the trout with your fingers and scatter on top. Serve with pumpernickel bread and/or pickled beets, if desired.