Prepare salmon burgers according to package directions and keep warm.
In a small mixing bowl, stir together the yogurt, mayonnaise, horseradish, and herbs. Add salt and pepper to taste.
To assemble, place the salmon burger patties on top of the bottom of the hamburger buns. Top each with a dollop of the herb sauce, french fried onions, and the bun tops.
Sponsor recipe courtesy of SeaPak Shrimp & Seafood Company