Start by patting the salmon fillets dry with paper towels. This helps the blackening seasoning adhere better to the fish. You can use either skin-on or skinless fillets depending on your preference.
In a small bowl, mix together black pepper, paprika, cayenne pepper, garlic powder, onion powder, thyme, and salt to create the blackening seasoning. Adjust the spice level according to your preference.
Sprinkle the blackening seasoning generously over both sides of the salmon fillets, ensuring they are evenly coated. Gently press the seasoning onto the fish to help it stick.
Heat a skillet or cast-iron pan over medium-high heat. Add a small amount of oil to the pan to prevent the salmon from sticking.
Once the skillet is hot, carefully place the seasoned salmon fillets in the pan. Cook for about 3-4 minutes on each side, or until the salmon is cooked through and blackened on the outside. Be cautious not to overcook the salmon to keep it moist and tender.
While the salmon is cooking, prepare the mango salsa. Dice ripe mangoes, red bell pepper, red onion, jalapeno (optional for heat), and cilantro. Combine them in a bowl and add a squeeze of lime juice for acidity. Season with salt and pepper to taste.
Once the salmon is cooked, remove it from the skillet and place it on a serving plate. Spoon the mango salsa over the top of each fillet, allowing the vibrant colors and flavors to complement the blackened salmon.
Garnish the dish with additional fresh cilantro leaves and lime wedges for extra flavor. Serve the blackened salmon with mango salsa immediately while it's still hot. Enjoy your flavorful and nutritious meal!