Clean the pork tenderloin from the membranes and excess fat. Rub the meat with salt.
In a bowl, combine the olive oil, soy sauce and lemon juice. Pour in the spices and stir in the marinade.
Place the meat in the marinade. Coat it on all sides and leave it to marinate for 30 minutes at room temperature or in the refrigerator for 1-2 hours.
Heat a grill pan and grease the grates with olive oil. Blot the tenderloin from the marinade and lay it out on the grill pan in a semicircle on the diagonal. Roast for about 3-4 minutes until charred streaks appear. Turn the mirin meat, without flipping, so that the skillet strips form a grid. Cook for 3 minutes. Turn tenderloin over and cook similarly until a grid pattern appears.
Cover the skillet with a lid or foil and reduce the heat. Check the temperature with a meat probe at the thickest part of the tenderloin. When it reaches 158°F turnoff the heat and leave the meat under the foil for another 5 minutes.