To begin to blend the eggs and cream, then add salt, pepper and parmesan cheese;

Mix the egg mixture with ricotta cheese.

Roll out the puff pastry in a baking tray lined with parchment paper and pierce it.

Caramelize the onion in a saucepan and use it to create a bed at the base of the cake, just above the puff pastry.

Add the Raclette, previously cut into cubes and pour the mixture of eggs and ricotta cheese.

Bake in a ventilated oven at 180 º C for 40 min.