Belgian Meatloaf

Name: Belgian Meatloaf
Ingredients: 1 teaspoon unsalted butter, melted; 1 cup breadcrumbs; 3⁄4 cup whole milk; 3 tablespoons unsalted butter; 1 large onion, finely chopped; 5 ounces white mushrooms, sliced; 1 garlic clove, finely chopped; 2 lbs lean ground beef; 1 large egg; 3 tablespoons fresh parsley, finely chopped; 1 teaspoon fresh sage, finely chopped; 1 teaspoon fresh oregano, finely chopped; 1 teaspoon fresh thyme, finely chopped; 1 teaspoon salt; 1 teaspoon pepper; 1 pinch nutmeg; 1 tablespoon port wine; 1 tablespoon cognac; 1 sprig rosemary