Skirt Steak Tacos With Greek Salsa

Season the steak with the smoked paprika, 1 teaspoon salt, and ½ teaspoon pepper. Heat 1 tablespoon of the oil 
 in a large cast-iron skillet over high heat. 
Cook the steak, turning once, until medium rare, 5 to 6 minutes. Let rest for 5 minutes before slicing against the grain.

Meanwhile, combine the onion and 
vinegar in a bowl and let stand for 5 minutes. Stir in the cucumber, tomatoes, 
 ¼ teaspoon each salt and pepper, and the remaining 2 tablespoons of olive oil.

Top the tortillas with the steak, salsa, and Feta.