With a sharp knife, chop the salmon into 1/4" pieces. Transfer to a large bowl.
Add the onion, cilantro, parsley, ginger, salt and pepper and stir to combine. Transfer to the fridge to chill for 15 minutes while you make the sauce.
In a food processor, mix the mayo, sour cream, anchovy paste, chives, parsley, capers, lemon juice and zest and the olive oil. Process until the herbs are chopped--just a minute or so. Set aside.
Remove the bowl from the fridge and form your salmon in to 5 1-inch thick patties. Work with them gently, and they will come together.
Heat 2 tablespoons vegetable oil in a heavy skillet over medium-high. Add the filets and sear on one side without moving them for 3 to 4 minutes. They should release naturally from the pan when they have a good crust. Turn, and cook 2 to 3 minutes more until desired doneness.
Serve warm with the lemon herb mayonnaise on your favorite buns with lettuce.