Pre-heat broiler on high. Line a broiler pan with foil and spray with cooking spray. Season fish with Cajun seasoning and salt. Arrange prepared fish filets in a single layer and broil until fish is golden brown and flakes easily with a fork, about 6-8 minutes.
While the fish is broiling, prepare mango salsa by tossing together all ingredients in a medium bowl. Season with salt and pepper to taste.
Remove the fish from the broiler pan to a plate and flake into bite-sized pieces with a fork.
To prepare the corn tortillas, heat canola oil over medium-high heat in a large non-stick pan. Using tongs, quickly toss the tortillas in the warm oil about 30-60 seconds per side and move to a plate lined with a towel. Cover the tortillas to keep warm and continue until you heat all 12 tortillas.
Divide the fish between the tortillas and top with mango salsa to serve.
Notes
This recipe is great for any firm, mild white fish. You can also use fresh or frozen fish!