Step 1

In a food processor, pulse 1 bun until coarse crumbs form; transfer to a plate. Add salmon to processor and pulse until coarsely chopped but not pureed. Transfer to a bowl and add 1/3 cup breadcrumbs, ginger, mustard, chives, 1 teaspoon salt, and 1/4 teaspoon pepper; stir to combine. Form into 4 patties, then coat with remaining breadcrumbs.

Step 2

In a large nonstick skillet, heat oil over medium. Add patties and cook until golden brown outside and opaque throughout, 4 minutes per side. Drain on a paper-towel-lined plate. Serve burgers in remaining buns with desired toppings.