Preheat oven to 375ºF. Line a rimmed baking sheet or 9 x 13-inch baking pan with parchment paper or foil for easier cleanup.
In a large mixing bowl, lightly beat two eggs.
Place onion, celery, carrot, and garlic in a small food processor and pulse until finely chopped. You should have about 1 cup of the mixture (discard any extra). Add to the mixing bowl.
Add ground turkey, cooked quinoa, chopped parsley, ¼ cup ketchup, Worcestershire, salt, and pepper. Mix until just combined (you can use your hands). Gather the mixture together, place on the sheet pan. Form into a loaf shape, about 11 x 5 inches, pressing firmly to shape the mixture.
Bake for 35 minutes.
Meanwhile, in a small bowl, combine ¼ cup ketchup, brown sugar, and red wine vinegar
After 35 minutes, remove meatloaf from the oven. Brush meatloaf with ketchup mixture and bake for an additional 35 to 40 minutes, or until the middle of the loaf reaches at least 165ºF when checked with an instant-read thermometer.
Let the meatloaf cool for 10 minutes before slicing and serving.
Notes
Quinoa: We use regular quinoa, not a tri-color blend, because the color blends in better with the meatloaf. Maybe add how to cook quinoa? Or a link to one of our posts?
Ground meat: If you prefer, the meatloaf can be made with a different type of ground meat instead of turkey, such as lean ground beef or ground chicken.