Rub salt into all sides of the skirt steaks. Rest at room temperature for 45 minutes.
Preheat a cast-iron skillet with olive oil over medium-high heat.
Sprinkle pepper on steaks before adding them to the pan. Sear for about 2-3 minutes on each side until golden brown.
Turn heat to low. Add the minced garlic to the pan. Spoon garlic and olive oil over the steaks, cooking for another 1-2 minutes until garlic becomes aromatic. Check that the internal temperature is 125-130 degrees for medium-rare.
Remove steaks from heat and place on a plate tented with foil for 5-10 minutes before serving. If desired, slice steaks against the grain.