Heat oven to 425 F. Line sheet pan with parchment paper.
In small bowl, combine garlic, lemon juice, rosemary, honey and salt. In another small bowl, combine breadcrumbs, walnuts and olive oil.
Place salmon on prepared sheet pan. Spread mustard mixture over fish; sprinkle with panko mixture, pressing to adhere. Lightly coat with nonstick cooking spray.
Bake 12-15 minutes, or until fish flakes easily with fork.
Place greens from salad kit in large bowl. Drizzle with dressing; mix well.
Evenly divide salad among two plates. Top with salmon. Serve each with lemon wedge, if desired.