Combine first 7 ingredients in a medium bowl; toss gently. Cover and chill.
Sprinkle fish with salt and pepper. Heat a large nonstick skillet over high heat until hot. Coat fish with cooking spray; add fish to skillet. Cook fish 1 minute on each side or just until lightly browned. Reduce heat to medium, and cook, uncovered, 7 minutes or until fish flakes easily when tested with a fork.
Place fish on individual serving plates, and spoon salsa over fish.