Prepare all the ingredients.
Shuck the oysters. Remove them from the shell and keep the water separately.
Filter the water.
the tomato using boiling water. Cool down.
Cut the carrots in julienne...
...then the leek whites...
...and celery sticks.
Reserve.
the leek whites for one minute. Drain and reserve.
Mix the 3 juliennes in a saucepan.
Add a knob of butter, salt and pepper using a mill.
these vegetables on medium heat. They must not change colour.
Chop the tomato into a small dice after you remove the flesh in a petal shape.
When finished, remove the julienne from the heat and keep warm.
Pour the water of the oysters and the white wine into a saucepan.
Add the oysters...
...and heat until simmering.
As soon as it simmers, remove from the heat and leave the oysters to for a few seconds before removing them. Keep warm.
the cooking juice by 3/4.
the sauce with butter...
...as you stir in a rotating movement.
Add diced tomato...
...and thoroughly mix. Adjust seasoning. (Easy with the salt!)
Add the thinly chopped basil last.
Place the julienne in the bottom of the plate.
Dress the lukewarm oysters.
them with the warm sauce.
Decorate using some sprigs of chervil.
Serve immediately.