In a small bowl, combine all ingredients. Cover and chill.
In a shallow dish, combine first 6 ingredients.
Pour EVOO into another shallow dish. Dip fish fillets in EVOO. Then coat with the spice mixture.
Heat a grill pan over medium-high heat until hot. Cook prepared fish for about 3-4 minutes on each side or until fish flakes easily with a fork.
Spread Cilantro Lime Mayonnaise Dressing evenly over buns. Place blackened fish on bottom half of bun, top with mango salsa, and cover with top half of bun.