Clean the fish fillet and cut into 2×2 cm cubes. Then sprinkle with juice of one lemon, season with salt and season with soy sauce. Cover and let it rest for half an hour.
In the meantime, thinly slice the lemon peel into tender strips. Heat the frying pan or stone, grease with clarified butter and sprinkle with salt.
Place the drained fish cubes in the roasting pan or on the stone and sprinkle with the lemon strips. Roast all around in about 2 to 3 min. **
Tip: Instead of clarified butter, you can also use butter in most cases.