Preheat oven to 400°F. Coat baking pan with nonstick cooking spray; set aside. Cut slit down side of salmon almost all the way through, but leaving one side intact, forming a pocket.
Heat oil in large sauté pan over medium-high heat. Add onion; sauté 3 minutes or until lightly browned. Add walnuts; sauté 1 minute. Add spinach; sauté 1 minute. Add breadcrumbs; season with nutmeg, and salt and pepper to taste. Cool 10 minutes in refrigerator. Fill pocket in salmon with stuffing.
Mix together mustard and honey; brush mixture over salmon. Place salmon on baking pan; bake 40 minutes or until fish flakes with fork.
Important Wal-Mart Disclaimer: All content, including but not limited to, recipe and health information provided in In Stores Now, is for educational purposes only. Such content is intended to supplement, not substitute for, the diagnosis, treatment and advice of a medical professional. Such content does not cover all possible side effects of any new or different health program. Consult your medical professional for guidance before changing or undertaking a new diet or exercise program. Advance consultation with your physician is particularly important if you are under eighteen (18) years old, pregnant, nursing, or have health problems.
