400 g very fresh cod loin, skin and pin bones removed
4 g fine sea salt (about 3/4 tsp), plus more to taste
1 g freshly ground black pepper
40 ml extra-virgin olive oil, plus 20 ml for finishing
15 ml fresh lemon juice
10 ml white wine vinegar
20 g capers in brine, drained and roughly chopped
2 large eggs
5 g Dijon mustard
2 g caster sugar (a small pinch)
5 g shallot, very finely minced
10 g fresh dill, roughly chopped
10 g fresh chervil, roughly chopped
5 g fresh flat-leaf parsley, roughly chopped
1 lemon, cut into wedges, for serving