01 -
Boil the potatoes in salted water for 10–12 minutes, until tender. Drain and let cool slightly.
02 -
Poach the cod in barely simmering water for 6–8 minutes, until it flakes easily. Remove, let cool, and break into large flakes.
03 -
In a small bowl, whisk together orange juice, mustard, vinegar, olive oil, salt, and pepper to make the vinaigrette.
04 -
In a large bowl, combine warm potatoes, flaked cod, red onion, and fennel (if using). Drizzle with the vinaigrette and toss gently to coat.
05 -
Sprinkle with chopped parsley and chives. Serve warm, at room temperature, or chilled.