Preheat the oven to 350°F. Line a rimmed baking sheet with foil and fit it with a wire rack. Lightly grease the rack.
In a small bowl, whisk the Dijon mustard and maple syrup to make the glaze. Divide the glaze into two equal portions. Set it aside.
2 tablespoons Dijon mustard, 2 tablespoons maple syrup
In a large bowl, combine the ground beef, kosher salt, black pepper, garlic powder, onion powder, dried thyme, and Parmesan.
2 pounds lean ground beef, 1 teaspoon Diamond Crystal kosher salt, ½ teaspoon black pepper, 2 teaspoons garlic powder, 2 teaspoons onion powder, 1 teaspoon dried thyme, 1 cup Parmesan
Shape the mixture into a loaf using a standard loaf pan. Line the loaf pan with cling wrap, add the meatloaf mixture, pressing it into a loaf shape. Once it's shaped, invert it onto a baking sheet and discard the cling wrap.