Heat the oven to 400 degrees F. Line a baking sheet with parchment paper or a silicone baking mat.
In a small bowl, stir together all of the ingredients for the glaze. Set aside.
In a large bowl, mix together the Impossible burger meat, onion, garlic, breadcrumbs, ketchup, Worcestershire, oregano, parsley, plant-based parmesan (if using), salt and pepper until just combined.
Shape into a loaf about 8 by 4 inches on the baking sheet, then brush with half of the glaze.
Bake for 15 minutes then remove the meatloaf and brush with the remaining glaze and bake for 15 minutes more, until browned and 160°F in the center.