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French Onion Chicken Orzo Casserole

A creamy and comforting casserole featuring orzo pasta, shredded chicken, and a rich blend of cheeses, perfect for busy weeknights and family dinners.
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Prep Time 15 minutes
Cook Time 40 minutes
Total Time 55 minutes
Servings: 6 servings
Course: Dinner, Main Course
Cuisine: Comfort Food, French
Calories: 550
Ingredients Method Notes

Ingredients
  

For the Casserole
  • 2 tablespoons unsalted butter
  • 1 tablespoon olive oil
  • 2 large yellow onions, thinly sliced
  • 1 teaspoon sugar
  • 1/2 teaspoon salt
  • 3 cloves garlic, minced
  • 1 1/2 cups orzo pasta
  • 2 cups cooked shredded chicken (rotisserie works well)
  • 1/2 teaspoon dried thyme
  • 1/4 teaspoon black pepper
  • 2 cups low-sodium chicken broth
  • 1 cup heavy cream (or half and half for a lighter option)
  • 1 1/2 cups shredded mozzarella cheese
  • 1/2 cup grated Parmesan cheese
  • 1/2 teaspoon Worcestershire sauce or balsamic glaze (optional)

Method
 

Preparation
  1. In a large oven-safe skillet or Dutch oven, melt the butter and olive oil over medium heat.
  2. Stir in the sliced onions, sugar, and salt. Cook for about 20–25 minutes, stirring occasionally, until the onions are deeply golden and caramelized.
  3. Add the minced garlic during the last 1–2 minutes.
Cooking
  1. Stir in the orzo and cook for 2 minutes to lightly toast it.
  2. Add the shredded chicken, thyme, and black pepper. Mix well.
  3. Add the chicken broth and cream. Bring to a gentle simmer, then reduce heat to low, cover, and let it cook for 8–10 minutes, stirring occasionally, until the orzo is tender.
Baking
  1. Stir in 1 cup of mozzarella and the Parmesan cheese. Mix until melted and creamy.
  2. Preheat the oven to 375°F (190°C). Sprinkle the remaining 1/2 cup of mozzarella on top.
  3. Bake uncovered for 10-15 minutes until bubbly and golden.
Serving
  1. Let it rest for 5–10 minutes before serving. Garnish with fresh thyme or parsley if desired.

Notes

This casserole keeps well in the fridge for about 3-4 days. You can freeze it for up to 3 months. Caramelization is key for the flavor, and adding veggies or using leftover chicken enhances the dish.