Tartare base
Clean, descale, dress, filet and debone the sea bass. Scrub and shuck the oysters, rinse them in fresh water and dry them on a clean dishcloth. Roughly chop the filets, gently mince the oysters and julienne the wakame. Combine in a bowl and refrigerate.
Seasoning
Prepare a dressing with the fromage frais, olive oil, lime zest and freshly grated ginger. Remove the tartare base from the fridge, then add the spices (fleur de sel and Kari Gosse) and lime juice to cure the seafood, as in a ceviche. Stir in half of the fromage frais dressing. Correct the seasoning, if necessary. Add 200-300ml of oil to a spoonful of the wakame-lemon tartare.
Assembly
Place a circle mould (6cm diameter, 3cm high) on a plate, and spoon in a quarter of the tartare base. Remove the mould and top with a dollop of the wakame-lemon tartare. Garnish the plate with a line of the fromage frais dressing, a line of the wakame-lemon tartare and a dusting of Kari Gosse.