1In medium bowl, mix lime juice, honey and salt; toss with remaining salsa ingredients. Cover and refrigerate at least 1 hour. Meanwhile, soak cedar plank in water at least 1 hour.
2Heat coals or gas grill for direct heat. Place salmon, skin side down, on cedar plank. Make diagonal cuts in salmon every 2 inches, without cutting through the skin. Rub brown sugar over salmon.
3Place cedar plank with salmon on grill. When cedar plank begins to smoke, cover grill. Cover and grill salmon over medium heat 30 to 35 minutes or until salmon flakes easily with fork. Remove salmon from plank, using large spatula. Serve with salsa.