Rinse the salmon side and dab dry. Clean and wash spring onions and cut into rings. Pack salmon, spring onions and other ingredients.
Grill for the indirect grilling method (The salmon is not cooked directly over the embers in the grill with lid. To do this, place the glowing charcoal on the edge and place a bowl with water in the middle of the grill. It catches dripping fat and thus prevents the formation of smoke). Spread a thin layer of oil on the skin side of the salmon, season the meat side with salt and pepper and spread the barbecue sauce over it. Place the fish on the grill with the skin side down. Spread spring onions on top. Grill the salmon side in the closed grill for about 25 minutes.