Preheat your oven to 350°F (175°C) and line a loaf pan with parchment paper for easy removal.
In a large mixing bowl, combine the Impossible Burger, cooked quinoa, chopped onion, bell pepper, minced garlic, grated carrots, and the flax egg mixture.
Add the gluten-free breadcrumbs, soy sauce, maple syrup, thyme, smoked paprika, black pepper, and salt.
Mix all the ingredients thoroughly until well combined. You can use your hands to ensure everything is evenly mixed.
Transfer the mixture into the prepared loaf pan, pressing it down firmly to shape it into a loaf. If desired, spread ketchup over the top for a glaze.
Bake in the preheated oven for 45-50 minutes, or until the loaf is firm and slightly browned on top.
Remove from the oven and let it cool for 10 minutes before slicing. This allows the loaf to set and makes it easier to slice.
Serve warm, garnished with fresh parsley if desired. Enjoy your delicious vegan meatloaf!