Preheating the oven: Preheat your oven to 180°C.
Preparation of the base: In a blender, put the grated Gruyere cheese, onion, raw potatoes cut into pieces, eggs, salt and pepper. Mix everything for 5 seconds at speed 5 to obtain a homogeneous preparation.
Cooking the base: Spread this preparation on a baking tray covered with parchment paper, forming a uniform rectangle. If available, use a silicone sponge cake plate. Bake for 25 minutes.
Filling and assembly: Once the base is cooked, let it cool. Then, place the slices of ham and the raclette cheese cut into slices on the surface.
Rolling: Gently roll the preparation to form a sausage. Make sure the potatoes are cool enough before rolling to prevent the roll from breaking.
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