1. To prepare salmon, combine the first 7 ingredients in a shallow dish or pie plate. Lightly coat both sides of fillets with cooking spray, and sprinkle evenly with 1/4 teaspoon salt. Dredge both sides of fillets in breadcrumb mixture.
2. Heat a large nonstick skillet over medium-high heat. Coat pan with cooking spray. Add fillets to pan; cook 3 minutes. Reduce heat to medium; carefully turn fillets over. Cook 4 minutes or until fish flakes easily when tested with a fork or until desired degree of doneness.
3. To prepare salad, combine juice, oil, mustard, 1/4 teaspoon salt, and 1/4 teaspoon pepper in a large bowl. Add mixed greens; toss gently to coat. Place 2/3 cup salad on each of 4 plates; top each serving with 1 fillet.