Brush the surface of the salmon with olive oil. Season the salmon with salt and pepper on both sides.
Grill the salmon over medium heat for 2-3 minutes.
Using a spatula, carefully turn the salmon over and grill for an additional 2 minutes.
Brush the salmon with teriyaki grilling sauce and turn, and grill for 1 minute.
Brush to coat the salmon again and turn.
Grill for an additional 1 minutes or until the fish is no longer translucent and flakes easily with a fork.
Transfer to a serving platter, top with sesame seeds and scallions. Serve immediately.