Mahi Mahi Tacos, Delicious and Healthy1 mango, peeled, pitted, and cubed  1 avocado, pitted, peeled, and cubed  1/2 red onion, finely chopped  Juice of 1 lime, plus wedges for garnish  chopped fresh cilantro  salt and black pepper  canola oil  2 large mahimahi fillets (1 1/2 lb total)  1 tbsp blackening spice  8 corn tortillas  2 cups finely shredded red cabbage