Heat oven to 425°F. Line a sheet pan with parchment paper.
Combine mustard, garlic, lemon juice, rosemary, honey, and salt in a small bowl. Combine bread crumbs, walnuts, and oil in another small bowl.
Place salmon on the prepared sheet pan. Spread the mustard mixture over the fish; sprinkle with the panko mixture, pressing to adhere. Lightly coat with cooking spray.
Bake for 12 to 15 minutes or until the fish flakes easily with a fork.
Place the greens from the Fresh Express® French Blue Cheese Salad Kits into a large bowl. Drizzle with dressings; mix well. Top with croutons and blue cheese.
Evenly divide the salad among four plates. Top with salmon. Serve with a lemon wedge if desired.