01 - Preheat oven to 375°F. Line a baking sheet with parchment paper or grease a loaf pan.
02 - In a large bowl, gently mix ground turkey, eggs, onion, garlic, celery, carrot, breadcrumbs, milk, Worcestershire sauce, salt, pepper, and thyme until just combined.
03 - Form the mixture into a loaf on the prepared baking sheet or press into the loaf pan.
04 - Whisk ketchup, brown sugar, apple cider vinegar, and Dijon mustard in a small bowl until smooth.
05 - Spread half of the glaze evenly atop the meatloaf.
06 - Bake for 40 minutes, then remove from oven.
07 - Brush the remaining glaze over the meatloaf surface.
08 - Return to oven and bake an additional 15 minutes until internal temperature reaches 165°F and glaze is caramelized.
09 - Allow meatloaf to rest for 10 minutes before slicing and serving.