Combine first 7 ingredients in a medium bowl; toss gently. Cover and chill.
Sprinkle fillets with salt and pepper.
Heat a large nonstick skillet over high heat until hot. Coat fillets with cooking spray; add fillets to pan. Cook fillets 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 fillets on individual serving plates; spoon salsa over fillets.