01 - Preheat oven to 350°F. Line a 9x5-inch loaf pan with parchment paper or lightly grease it.
02 - In a large bowl, gently mix ground turkey, onion, garlic, carrot, celery, breadcrumbs, milk, eggs, ketchup, Worcestershire sauce, thyme, oregano, salt, and pepper until just combined.
03 - Transfer mixture to prepared pan and shape into an even loaf.
04 - Mix ketchup with Dijon mustard and spread evenly over loaf surface.
05 - Bake for 55 to 60 minutes, or until internal temperature reaches 165°F.
06 - Allow loaf to rest for 10 minutes before slicing. Serve warm.