Spread out a roll of puff pastry in a baking-tin.
On the fire cooking four leeks you have cut in rings with some butter (about 80 gr); the fire has to be not too strong.
Then put the leeks on the puff pastry.
In a tureen beat up two eggs with a smell of salt, 50 gr of cream and two spoons of grated cheese (in Italy we use parmigiano or grana, cheese fo pasta, you know); the cream has to be not too liquid but if you think your cream is too dry add just a little of milk.
Distribute the souse on the leeks and put the baking-tin in the oven at 180° C for 30/35 minutes, until you can see the salad cake is gilt.
I hope you could understand. I am here for more explanation you need. If I have explain it well it will be really fantastic.