Place the salmon in a food processor and pulse to coarse grind the fish.Transfer the fish to a mixing bowl and season with the grill seasoning, poppy and sesame seeds, onion flakes, and dill. Use your hands to mix, then divide into 4 equal portions and form each portion into a patty.
Heat a about a tablespoon of olive oil in a large skillet over medium high heat.
Cook the burgers for 3 minutes on each side for a pink center, 4-5 minutes on each side for fully cooked.
While the burgers cook, combine the cream cheese with the scallions. Fold in the sour cream and lemon juice. Split and lightly toast the rolls.
Serve the burgers on the toasted buns topped with lettuce, tomato, red onion, and some of the cream cheese sauce.