1. In a mixing bowl, combine the chopped salmon, breadcrumbs, beaten egg, mayonnaise, Dijon mustard, lemon juice, green onions, salt, and black pepper. Mix well.
2. Form the mixture into 4 equal patties.
3. Preheat the grill to medium-high heat. Lightly oil the grill grate.
4. Grill the salmon patties for about 4-5 minutes on each side, or until fully cooked through.
5. Serve the salmon burgers on toasted buns with your favorite toppings.