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White Fish Baked on Creamed Spinach with Crushed Potato

Fish fillets baked on a bed of spinach chopped fine and folded into a Parmesan béchamel, with buttery crushed potato alongside.

White Fish Baked on Creamed Spinach with Crushed Potato. Fish fillets baked on a bed of spinach chopped fine and folded into a Parmesan béchamel, with buttery crushed potato alongside.
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Prep 20 minCook 35 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 (600 g)
  • 1 bag baby spinach (200 g)
  • 450 ml reduced-fat milk (464 g)
  • 70 g skim milk powder
  • 25 g plain flour
  • 40 g unsalted butter
  • 30 g parmesan, finely grated
  • 700 g potato, peeled and cut into chunks
  • 25 g olive oil
  • 15 ml lemon juice (15 g)
  • 1 garlic clove, crushed (5 g)
  • 0.5 g iodised table salt
  • black pepper, to taste

Method

  1. Heat the oven to 180C fan. Wilt the spinach in a dry pan with the garlic over medium heat, 3 minutes, until it has collapsed to a fraction of its volume.
  2. Tip it into a sieve and press hard with the back of a spoon until no more water comes out, then chop it finely on a board. Whole leaves stay stringy however soft they feel; chopped, they disappear into the sauce.
  3. Melt 25 g of the butter in a saucepan, stir in the flour and cook 2 minutes. Whisk in 300 ml of the milk a little at a time along with the milk powder and cook 4-5 minutes until it thickens to a coating sauce. Off the heat, stir in the Parmesan, the spinach, the salt and some pepper.
  4. Spread the creamed spinach in a baking dish, lay the fish on top, brush it with the olive oil and squeeze the lemon over. Bake 18-20 minutes, until the fish parts into flakes under gentle pressure from a fork.
  5. Meanwhile boil the potato 22-25 minutes until it collapses. Drain, dry it in the pan for a minute, then crush it with the remaining butter and the rest of the milk. Crushed, not whipped: whipping makes it gluey.
  6. Check the fish over for pin bones as you serve it. Spoon the potato alongside and the spinach sauce over the top of everything.

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 60°C

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

Cool and cover within two hours of cooking; split large amounts into shallow containers so they chill quickly. Reheat until steaming hot, at least 60°C.

Where these temperatures come from