01 - Preheat oven to 400°F. Lightly grease a 12-cup muffin tin or line with paper liners.
02 - In a large mixing bowl, combine ground turkey, onion, carrot, celery, and garlic.
03 - Add milk, egg, tomato paste, Worcestershire sauce, breadcrumbs, Italian herbs, salt, and pepper. Gently mix until just combined — do not overmix.
04 - Evenly divide the mixture among the muffin tin cups, pressing gently to pack.
05 - Top each muffin with a small spoonful of ketchup.
06 - Bake for 22–25 minutes, or until the internal temperature reaches 165°F and muffins are lightly browned.
07 - Let cool for 5 minutes before removing from the tin. Serve warm.