01 -
Melt butter and olive oil in a large oven-safe skillet or Dutch oven over medium heat. Add sliced onions, sugar, and salt. Cook for 20 to 25 minutes, stirring occasionally, until onions are deeply golden and caramelized. Stir in minced garlic during the last 1 to 2 minutes.
02 -
Add orzo to the skillet and cook for 2 minutes to lightly toast it. Stir in shredded chicken, dried thyme, black pepper, and Worcestershire sauce or balsamic glaze if using. Combine thoroughly.
03 -
Pour in the chicken broth and heavy cream. Bring to a gentle simmer, reduce heat to low, cover, and cook for 8 to 10 minutes, stirring occasionally, until orzo is tender.
04 -
Stir in 1 cup of mozzarella and the Parmesan cheese until fully melted and creamy.
05 -
Preheat oven to 375°F (190°C). Sprinkle remaining ½ cup mozzarella on top and bake uncovered for 10 to 15 minutes until bubbly and golden.
06 -
Allow to rest for 5 to 10 minutes before serving. Optionally garnish with fresh thyme or parsley.