
This bright, hearty seafood dinner pairs tender rainbow trout with zesty lemon and dill, a tangy pickled potato salad, and a crisp radish slaw. It is fresh enough for warmer days but substantial enough for a satisfying family meal.
Place the potatoes in a large pan of salted water and bring to a boil. Cook for 10-15 minutes, or until just tender when pierced with a fork. Drain well, return them to the hot pan for 1 minute to steam-dry, then toss with the white wine vinegar, honey, and a little seasoning. Set aside to cool so the potatoes absorb the dressing.
Heat the oven to 200C/180C fan/gas 6, or preheat the air fryer to 180C. Stuff each trout cavity with lemon slices and a few sprigs of dill. Rub the fish all over with olive oil, place on a baking tray or in the air-fryer basket, season inside and out, and squeeze over a little extra lemon juice. Roast or air-fry for about 20 minutes, until the skin is lightly golden and the flesh flakes easily.
While the fish cooks, make the slaw. In a large non-metallic bowl, combine the radishes, shredded hispi cabbage, extra-virgin olive oil, parsley, 1 tbsp of the vinegar, the sugar, and a little seasoning. Toss well and set aside for a few minutes to lightly soften.
Finish the potato salad by folding the mayonnaise, soured cream, cornichons, pickled onions, wholegrain mustard, chopped dill, chives, and the remaining dill into the cooled potatoes. Taste and adjust with a splash more vinegar or a little more mayonnaise or soured cream if needed. Serve the trout with the potato salad and radish slaw.
If whole rainbow trout is unavailable, use trout fillets and reduce the cooking time to 10-12 minutes. The potato salad can be made several hours ahead and chilled, but bring it back toward room temperature before serving for the best texture. Avoid overcooking the fish; it is ready as soon as the flesh flakes easily at the thickest part.
