Preheat oven to 350°F (175°C). Line loaf pan with parchment paper.
Heat olive oil in skillet. Sauté onions until translucent (5 minutes). Add garlic, cook 1 minute more. Cool.
Mix ground chicken, cooled onion mixture, breadcrumbs, milk, eggs, parsley, Worcestershire sauce, and seasonings in large bowl.
Transfer to loaf pan. Press gently to remove air pockets.
Mix glaze ingredients. Spread half over meatloaf.
Bake 45 minutes. Add remaining glaze.
Bake additional 15-20 minutes (internal temperature 165°F/74°C).
Rest 10 minutes before slicing.