01 - Preheat oven to 375°F. Line a loaf pan with parchment paper or grease it lightly.
02 - In a large bowl, mix ground turkey, breadcrumbs, onion, garlic, eggs, milk, ketchup, Worcestershire sauce, thyme, salt, and pepper until just combined.
03 - Transfer mixture into the prepared pan and press gently to shape evenly.
04 - Whisk together ketchup, brown sugar, and Dijon mustard until smooth, then spread evenly over the meatloaf surface.
05 - Bake for 55 to 60 minutes or until internal temperature reaches 165°F. Allow to rest for 10 minutes before slicing.
06 - Place potatoes in a pot, cover with cold water, add a pinch of salt, and bring to a boil. Simmer for 15 to 18 minutes until tender.
07 - Drain potatoes and return to pot. Add warmed milk and butter, then mash until creamy. Season with salt and pepper.
08 - Slice meatloaf and plate alongside mashed potatoes. Garnish with chives if desired.