01 - Preheat oven to 375°F. Line a baking sheet with parchment paper or lightly grease a loaf pan.
02 - In a skillet over medium heat, sauté onion, celery, and carrots for 4 to 5 minutes until softened. Add garlic and cook for 1 minute more. Remove from heat and cool slightly.
03 - In a large mixing bowl, whisk together eggs and milk. Stir in breadcrumbs and let soak for 2 minutes.
04 - Add sautéed vegetables, parsley, Worcestershire sauce, salt, pepper, thyme, and smoked paprika. Mix well.
05 - Add ground turkey and gently mix until just combined, avoiding overworking the mixture.
06 - Shape the mixture into a loaf on the prepared baking sheet, or spoon into a loaf pan and smooth the top.
07 - In a small bowl, combine ketchup, brown sugar, apple cider vinegar, and Dijon mustard.
08 - Spread half the glaze over the top of the meatloaf.
09 - Bake for 40 minutes. Remove from oven and spread remaining glaze over the top.
10 - Return to oven for 15 minutes, or until internal temperature reaches 165°F. Let rest for 10 minutes before slicing and serving.