Chop the tuna fillet with a knife. Mix with 4 tablespoons of olive oil, finely chopped shallots, chives, tarragon, salt and pepper. Pour into a round shape and let it steep.
Cut the zucchini into thin slices and fry them briefly on a grill pan with olive oil until the grill marks can be seen. Salt and pepper. Place on the plate and shape three slices into a flower.
To garnish, cut the leek stick into fine strips and fry briefly in hot fat. The leek should stay green, not let it turn brown.
Cut two whole zucchini into cubes and fry them in a pan with salt and pepper in olive oil and let them cook. Deglaze with white wine. When everything is cooked, refine with cream in a mixer and mix until the cream is frothy. Finally add some oil.
Place the tuna tartar on the grilled zucchini. Spread the zucchini cream lightly round. Finally add a few drops of balsamic vinegar.
On the tuna tartar, shape the fried leek strips into a mountain and apply some coarse-grained sea salt.