In a mixing bowl, combine the chopped salmon, breadcrumbs, beaten egg, mayonnaise, Dijon mustard, lemon juice, green onions, salt, and black pepper. Mix well.
Form the mixture into 4 equal-sized patties.
Heat the olive oil in a frying pan over medium heat.
Cook the salmon patties for about 4-5 minutes on each side, or until golden brown and cooked through.
Serve the salmon burgers on buns with your favorite toppings.