2 tablespoons olive oil, divided
1 2 1/2-pound center-cut wild salmon fillet, skin and pinbones removed
1/2 cup fresh orange juice
1/4 cup fresh lemon juice
1 teaspoon coarse kosher salt
Brush small rimmed baking sheet with 1 tablespoon oil. Place salmon on prepared baking sheet. Mix orange juice and lemon juice in small bowl; pour over salmon. Drizzle remaining 1 tablespoon oil over salmon; sprinkle with coarse kosher salt and pepper. Let stand 15 minutes.
Preheat broiler. Broil salmon, without turning fish over, until just opaque in center, watching closely and turning baking sheet once for even broiling, about 12 minutes. Using 2 wide spatulas, transfer salmon to platter. Surround with Peas and Pea Tendrils with Lemon Dressing. Serve with Dill-Cucumber Sauce.
Dill Cucumber Sauce
1 1/3 cups (packed) coarsely chopped fresh dill
1 cup 1/2-inch cubes unpeeled English hothouse cucumber
1 1/2 tablespoons minced shallot
1/4 teaspoon cayenne pepper
3/4 cup mayonnaise
3/4 cup sour cream
Blend dill, cucumber, shallot, and cayenne in processor until cucumber is finely chopped; transfer to medium bowl. Whisk in mayonnaise and sour cream. Season to taste with salt and pepper