01 - Submerge the cedar plank completely in water for at least 1 hour, using a weight to keep it fully immersed.
02 - Preheat the grill to medium-high heat, aiming for approximately 400°F.
03 - In a small saucepan over medium heat, combine the cherries, balsamic vinegar, honey, Dijon mustard, fresh ginger, minced garlic, red pepper flakes if desired, and a pinch of salt. Bring to a simmer and cook for 8 to 10 minutes, stirring periodically until the cherries are softened and the glaze has thickened. Slightly mash the cherries for a chunky texture, or blend for a smoother consistency. Remove from heat and set aside.
04 - Pat the salmon fillets dry with paper towels. Rub each fillet with olive oil and evenly season both sides with sea salt and freshly ground black pepper.
05 - Place the soaked cedar plank on the preheated grill grates for 2 to 3 minutes, until the wood starts to smoke and crackle.
06 - Arrange the lemon slices across the surface of the cedar plank. Position the salmon fillets skin-side down on top of the lemon slices.
07 - Generously brush each salmon fillet with the prepared cherry glaze, reserving a portion of the glaze for serving.
08 - Close the grill lid and cook for 15 to 20 minutes, until the salmon is just cooked through and flakes easily with a fork. Internal temperature should reach 125°F to 130°F for medium.
09 - Carefully remove the cedar plank from the grill. Spoon the remaining cherry glaze over the salmon and finish with chopped chives or parsley if desired. Serve immediately.