1. 1

   Step 1

   Preheat the oven to 175°C.

2. 2

   Step 2

   Peel 3 yellow onions and 1.5 kg of waxy potatoes.

3. 3

   Step 3

   Slice the onion thinly.

4. 4

   Step 4

   Sauté the onion in 30 g of butter in a frying pan until softened without browning.

   Timer 5 min
5. 5

   Step 5

   Cut the potatoes into thin strips.

6. 6

   Step 6

   Grease an ovenproof dish with a little of the remaining butter.

7. 7

   Step 7

   Layer the potatoes, onion, and 300 g of anchovy fillets in the dish. Save the anchovy brine.

8. 8

   Step 8

   Start and finish with a layer of potatoes.

9. 9

   Step 9

   Bring 400 ml of heavy cream and 200 ml of milk to a boil in a saucepan.

   Timer 5 min
10. 10

    Step 10

    Mix the anchovy brine into the cream and milk mixture and pour the liquid over the dish.

11. 11

    Step 11

    Sprinkle with 20 g of breadcrumbs and dot with the remaining butter on top.

12. 12

    Step 12

    Bake in the lower part of the oven for 90–120 minutes. Cover with foil towards the end if necessary.

    Timer 120 min

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