Mix together salmon, bread, onion, all-purpose flour, egg, salt and pepper. Shape into four patties.
In a large skillet heat oil over high heat. Cook the patties until browned on both sides, about 8 minutes. Drain briefly on paper towels before serving.
Dill Sauce
Whisk together sour cream, mustard, lemon juice and dill until well blended. Chill before serving.