Slow Roasted Salmon with Mustard Parsley Glaze

1 Put a rack in middle of oven and preheat oven to 225°. Butter a roasting pan large enough to hold salmon without crowding.
2 Stir together butter, bread crumbs, parsley, mustard seeds, lemon juice, mustard and honey in a small bowl until well combined.
3 Arrange salmon fillets in roasting pan and sprinkle with salt and pepper. Spread mustard glaze evenly over salmon.v
4 Roast until fish is just cooked through, it will turn opaque, 25 to 30 minutes.