Preheat the broiler.

Combine lemon juice, parsley, cilantro, garlic, cumin, and cayenne in a medium bowl.

Rub the fillets with the mixture until well-coated on both sides.

Chill and marinate for at least 1 hour.

Place fish in a nonstick broiling pan and cook for about 4 minutes on each side or until the salmon is opaque in the center.

Serve immediately.