marinate skirt or flank steak in a mix of lime juice, garlic, cilantro, cumin, and chili powder for 1-4 hours. Preheat your grill to high (450-500°F). Pat the steak dry, season with salt, and grill 3-5 minutes per side for medium-rare (135°F internal). Let rest 5 minutes, then slice thinly against the grain. Serve with tortillas, salsa, and lime.