Preheat your oven to 375°F (190°C) and line a baking sheet with parchment paper.
In a large mixing bowl, combine the ground chicken, breadcrumbs, Parmesan cheese, chopped onion, minced garlic, egg, Worcestershire sauce, dried Italian herbs, salt, and pepper. Mix until all ingredients are well incorporated.
Divide the mixture into eight equal portions and shape them into mini meatloaves, placing them on the prepared baking sheet.
In a small bowl, whisk together the ketchup, brown sugar, and apple cider vinegar until smooth.
Brush the glaze generously over the top of each mini meatloaf.
Bake in the preheated oven for 25-30 minutes, or until the internal temperature of the meatloaves reaches 165°F (74°C).
Remove from the oven and let them rest for 5 minutes before serving.
Garnish with freshly chopped parsley before serving.
Notes
Let the meatloaves rest before serving for better texture.