Preheat oven to 500 degrees F. In a small bowl, combine 3/4 cup milk, 2 tsp salt. In a separate bowl, mix together 3/4 cup bread crumbs, 1/4 cup grated Parmesan cheese, 1/4 tsp ground dried thyme. Dip the haddock fillets in the milk, then press into the crumb mixture to coat. Place haddock fillets in a glass baking dish, and drizzle with 1/4 c. melted butter. Bake on the top rack of the preheated oven until the fish flakes easily, about 15 minutes.