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Baked White Fish with Tomato, Olive & Caper Sauce

White fish fillets baked in a punchy tomato sauce with olives and capers, over roast potatoes, with bread for the sauce.

Baked White Fish with Tomato, Olive & Caper Sauce. White fish fillets baked in a punchy tomato sauce with olives and capers, over roast potatoes, with bread for the sauce.
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Prep 20 minCook 40 minServes 4

Ingredients

Why metric?

Metric avoids regional spoon ambiguity. US uses 5 mL tsp, 15 mL tbsp and 240 mL cup. Small masses stay in grams unless a verified recipe conversion exists. More on measurements

  • 4 skinless white fish fillets (700 g)
  • 900 g potatoes, cut into 2 cm pieces
  • 70 ml extra-virgin olive oil (64 g)
  • 1 brown onion, finely sliced (150 g)
  • 3 garlic cloves, sliced (15 g)
  • 400 g canned no-added-salt tomatoes
  • 60 g pitted olives, drained and halved
  • 25 g capers, drained and rinsed
  • 2 g dried oregano
  • 20 ml lemon juice (20 g)
  • 10 g flat-leaf parsley, chopped
  • 6 slices wholegrain bread (180 g), to serve
  • Iodised table salt, to taste
  • Ground black pepper, to taste

Method

  1. Heat the oven to 220C/425F. Toss the potatoes with a third of the oil and a little salt, spread them on a large tray and roast 30-35 minutes, turning once, until crisp at the edges.
  2. Meanwhile, warm the remaining oil in a wide ovenproof pan over medium heat and cook the onion for 8 minutes, until soft. Add the garlic and oregano for a minute.
  3. Add the tomatoes, crush them roughly and simmer 10-12 minutes, until the sauce no longer runs when you part it with a spoon. Stir in the olives and capers. Between them they salt the sauce, so taste before adding any more.
  4. Nestle the fish into the sauce, spoon a little over each fillet and grind over pepper.
  5. Bake 10-14 minutes, depending on thickness. The fish is done when it has turned from glassy to opaque all the way through and flakes at the thickest point.
  6. Finish with the lemon juice and parsley and serve with the roast potatoes, with the bread for whatever sauce is left in the pan.

Safety and storage

Cook to
63°C / 145°F in the centre (fish)
Keeps
3 days refrigerated below 5°C
Reheat to
steaming hot, at least 75°C

Colour and clear juices are not a reliable test. Check the thickest part with a thermometer.

Cool it fast: split large amounts into shallow containers as soon as it stops steaming, and have it in the fridge within two hours. Reheat once only, until steaming hot right through, at least 75°C in the centre.

Where these temperatures come from

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