Coat fish with vegetable oil. Season with salt and pepper. Prepare grill for medium heat. Grill fish 5 to 10 minutes, depending on thickness, or just until fish is cooked through.
Divide fish among tortillas. Top with cabbage, salsa and a squeeze of lime. Drizzle with Marie’s Chipotle Ranch Dressing. Sprinkle with cilantro. (If corn tortillas are very thin, double the amount and use two per taco.)