To prepare salmon, heat a large nonstick skillet coated with cooking spray over medium heat. Sprinkle fish with 1/4 teaspoon salt and 1/4 teaspoon black pepper. Add fish to pan, and cook for 9 minutes or until the fish flakes easily when it is tested with a fork, turning once.
To prepare salsa, combine mango and the next 6 ingredients (mango through jalapeño) in a medium bowl, and toss well to combine.
Combine the salad greens, juice, 1/4 teaspoon salt, 1/8 teaspoon black pepper, and avocado wedges in a large bowl; toss gently to combine. Arrange a salmon fillet on each of 4 plates; top each with 1/2 cup salsa and 1 1/2 cups salad mixture.