Preheat your oven to 400 degrees. Line a baking sheet with aluminum foil and spray it with non-stick cooking spray.
Lay your salmon on a cutting board, and season lightly with salt and pepper. Using a pastry brush, liberally brush on the dijon mustard to cover the whole piece of fish.
In a small bowl, combine the panko breadcrumbs, olive oil, thyme, onion and garlic powder, paprika, mustard powder, zest, and salt and pepper. Make sure the mixture is well combined, and press all into the salmon so you can’t see any flesh left.
Lay the salmon on the sprayed baking sheet, and bake in the oven for about 15-20 minutes, depending how thick your salmon is. The top will be crispy and the salmon will be cooked through and flaky. Serve with a wedge of lemon and enjoy!