Salmon Rosti

Name: Salmon Rosti
Ingredients: 2 6- to 7-ounce cans boneless, skinless wild Alaskan salmon, drained; ½ cup finely chopped red onion; 2 large eggs plus 1 large egg white, lightly beaten; 1 tablespoon whole-grain mustard; 3 tablespoons chopped fresh dill or 3 teaspoons dried, divided; ½ teaspoon freshly ground pepper; ¼ teaspoon salt; 4 cups frozen hash-brown shredded potatoes (about 12 ounces); 2 tablespoons extra-virgin olive oil, divided; ⅓ cup reduced-fat sour cream; 1 tablespoon capers, rinsed and chopped; 1 teaspoon lemon juice