1 1 / 2 lb (680 g) skirt or flank steak, trimmed 1 tbsp (15 ml) neutral oil (for marinade) 1 tbsp (15 ml) neutral oil (for cooking) 3 tbsp (45 ml) fresh lime juice (about 2 limes) 1 tbsp (15 ml) orange juice (optional, for subtle sweetness) 2 tsp soy sauce or Worcestershire sauce 3 cloves garlic, minced 1 tsp ground cumin 1 tsp chili powder or ancho chili powder 1 / 2 tsp smoked paprika 1 / 2 tsp dried oregano 1 tsp kosher salt, plus more to taste 1 / 2 tsp freshly ground black pepper 12 small corn tortillas 1 / 2 small white onion, finely diced (about 1 / 2 cup / 120 ml) 1 / 2 cup (15 g) fresh cilantro, chopped 1 avocado, sliced or mashed 1 / 2 cup (120 ml) salsa or pico de gallo 4 radishes, thinly sliced (optional) 1 / 2 cup (60 g) queso fresco or cotija, crumbled (optional) Lime wedges, for serving
Make the marinade: In a bowl, whisk together 1 tbsp neutral oil, lime juice, orange juice (if using), soy/Worcestershire, garlic, cumin, chili powder, smoked paprika, oregano, 1 tsp kosher salt, and black pepper. Marinate the steak: Place steak in a resealable bag or shallow dish, pour in the marinade, and coat well. Refrigerate 30 minutes to 8 hours (longer = more flavor). Prep to cook: Remove steak from marinade and pat dry. Discard excess marinade. If needed, lightly season both sides with a pinch of salt. Cook the steak: Heat a grill or heavy skillet over high heat until very hot. Add 1 tbsp neutral oil if using a skillet. Cook steak 3–5 minutes per side for skirt (4–6 minutes per side for flank), until nicely charred and an instant-read thermometer reads 130–135°F (54–57°C) for medium-rare. Rest and slice: Transfer steak to a cutting board and rest 5–10 minutes. Slice thinly against the grain; for skirt, slice on a bias for wider pieces. Warm the tortillas: Heat tortillas on a dry skillet or directly over a low flame 20–30 seconds per side until pliable. Keep warm wrapped in a clean towel. Assemble: Divide steak among tortillas. Top with diced onion, cilantro, avocado, and salsa. Add radishes and queso fresco if desired. Serve: Finish with lime juice and a pinch of salt to taste. Serve immediately.
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