Directions for slaw:
Combine apple cider vinegar, cilantro, lime zest, lime juice, sugar, salt and pepper in a medium bowl; mix until smooth and creamy. Add cabbage and toss to combine. Refrigerate until ready to use.
Directions for tacos:
Combine ingredients for the basting sauce into bowl and mix. Set aside. Oil the grill rack and Preheat grill to medium high. Grill Mahi filets until they are cooked through approximately 3 minutes per side. Continuously baste Mahi- Mahi, turning fish over only once.
While Mahi is on the grill, heat tortillas until soft in the microwave or in the oven. Option 1: In the Microwave, wrap stacks of up to 12 tortillas in barely damp paper towels; microwave on High for 30 to 45 seconds. Wrap tortillas in a clean towel to keep warm. Option 2: In the Oven, wrap stacks of 6 tortillas in foil; place in a 375 degrees F oven for 10 to 15 minutes. Wrap tortillas in a clean towel to keep warm.
When Fish is white and flakey, remove from heat. Carefully cut fish into large chunks. Place fish into tortillas and build your taco, starting with fish, and slaw and toppings of your choice.
Combine all ingredients. Season with salt and pepper.
Mix diced tomatoes, onions and cilantro in a large bowl. Add the lime juice and salt stir.
Combine all ingredients in a bowl and mix well. Set aside and refrigerate for 30 minutes.