Fajita Marinade

2 pounds skirt steaks (fajitas)
3/4 cup Mexican lime juice
1/4 teaspoon Worcestershire sauce
1/4 teaspoon soy sauce
1/2 teaspoon ground black pepper
1/2 teaspoon salt, or to taste

Halve the skirt steaks lengthwise. Mix the remaining ingredients. Marinate skirt steaks for no more than 1 hour. Grill the skirt steaks slowly over mesquite.