Place salmon on a greased 15x10x1-in. baking pan; sprinkle with salt and 1/2 teaspoon pepper. Drizzle with 1 tablespoon lemon juice; top with dill sprigs., Bake, uncovered, at 425° for 15-18 minutes or until fish flakes easily with a fork. Flake salmon into large pieces., In a small bowl, combine the cucumber, sour cream, red pepper, snipped fresh dill, capers and remaining pepper and lemon juice., Divide lettuce among 4 plates. Top with peach, hazelnuts, blueberries, onion and salmon. Serve with dressing.