In a shallow dish whisk together the breadcrumbs, grated Parmesan cheese and thyme. (Pie dish works great for this)
Pour the milk into a medium size bowl and mix in the salt.
Pat the fish dry with paper toweling, dip in the milk mixture and then roll in the bread crumbs putting a little pressure on the fillets to coat the fish.
Place the fillets in a baking dish lightly coated with cooking spray-melt the butter and drizzle it over the top of the fish.
Bake until the fish is done and flakes easily. (15-20 minutes-Haddock is pretty thick so I used an instant-read thermometer for a temp. of 145F.)