Jansson's Temptation

Preparation

1. 1

   Peel the potatoes and cut them into thin matchsticks.

2. 2

   Finely slice the onion and sweat it for 5 minutes in a knob of butter, without coloring.

3. 3

   Butter a gratin dish and layer potatoes, then softened onion, then a few pieces of chopped anchovy fillets. Repeat the layers, finishing with potatoes.

4. 4

   Pour half the cream over everything and bake at 200°C for 20 minutes.

5. 5

   Remove the dish, pour the remaining cream on top so the surface potatoes don't dry out, and continue baking for 25 minutes, until nicely golden.

6. 6

   Check the potatoes with a knife tip: they should be very tender.

7. 7

   Let rest 5 minutes before serving: the cream will firm up slightly.