Preheat your oven to 350°F (175°C).
In a large bowl, combine ground turkey, breadcrumbs, onion, bell pepper, and garlic.
Add the egg, milk, ketchup, Worcestershire sauce, salt, pepper, and thyme.
Mix everything until well combined.
Transfer the mixture into a loaf pan and shape it into a loaf.
Spread an additional layer of ketchup on top if desired.
Bake in the preheated oven for 1 hour.
Check for doneness using a meat thermometer (should read 165°F/74°C).
Once cooked, let it rest for 10 minutes before slicing.
Serve warm and enjoy!