Potato gratin with two salmon

1 Peel the potatoes, cut them into thin strips and place them in a terrine.
2 Salt and pepper then stir to distribute the seasoning. Preheat the oven at thermostat 6 (180 ° C).
3 Butter a gratin dish. Arrange successively a first layer of potatoes, a second of fresh salmon, one of smoked salmon, then a last of potatoes.
4 In a saucepan, heat the cream and pour it over the entire surface of the preparation.
To finish
Bake and cook for an hour. The top should be golden at the end of cooking, if this is not the case, turn on the grill for a few minutes to brown.