Chop the salmon into small pieces, put it in a bowl and mix it with your hands until it becomes somewhat homogenized.
Add all other ingredients except buns and mix well with a spoon until they are well mixed. Make 4 equal sized burgers.
Heat a pan (or grill) in medium to high heat and cook the salmon burgers by turning them until golden - about 3-4 minutes per side.
Remove from the fire, place the burgers on the rolls and serve with extra BBQ sauce, lettuce and onion.