Salt and pepper the fish, grease with lemon juice, send it to marinate in the cold, I left it for an hour.
Then fry the steak on both sides until golden brown, and serve with aioli sauce.
Aioli sauce:
In a small bowl, thoroughly crush the garlic with coarse salt and a pinch of sugar into gruel.
Add the yolk, stir, beat with a mixer, and add a teaspoon of oil every 5 seconds.
When the mass begins to turn white and the emulsion process begins, the oil can be poured more boldly. You should get the most delicate sauce with a thick consistency. You can add lemon juice (1 teaspoon) and finely chopped parsley.