Combine slaw ingredients in large bowl. Mix dressing ingredients and pour over slaw. Taste and add salt to preference. Let slaw sit while preparing fish and tortillas.
Preheat oven to 400ºF
Place cod on rimmed baking sheet lined with parchment or foil. Drizzle with oil. Combine spices in small bowl. Sprinkle spice mixture over fish. Bake 10-15 minutes or until fish is flaky and opaque. Time will vary depending on thickness of filets.
Tacos:
Heat a drizzle of oil in frying pan over medium/high heat. Fry tortillas until just golden brown.
Fill tortillas with flaked cod and mango slaw. Top with additional cilantro and crumbled queso fresco.