Very generally speaking, fajitas are traditionally made with grilled meat, often skirt steak, or chicken and sauteed peppers and onions. So, with that caveat, I suggest that this recipe with grilled skirt steak and flour tortillas leans more to a fajita ... with a spin. In place, a fresh and chunky black bean and corn salsa is added. Place the skirt steak in a baking dish. Remove the skirt steak from the marinade and grill over direct heat 6 to 8 minutes, turning as needed.