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French Onion Chicken Orzo Casserole

A comforting and heartwarming casserole featuring caramelized onions, tender chicken, and creamy orzo, perfect for chilly evenings.
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Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings: 6 servings
Course: Dinner, Main Course
Cuisine: American, Comfort Food
Calories: 480
Ingredients Method Notes

Ingredients
  

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

Method
 

Preparation
  1. In a large oven-safe skillet, melt the butter and olive oil over medium heat until fragrant.
  2. Add the sliced onions, sugar, and salt. Cook for about 20-25 minutes, stirring often, until they are beautifully golden and softened. Stir in the garlic for the last couple of minutes.
  3. Add the orzo and toast it lightly for about 2 minutes.
  4. Mix in the cooked shredded chicken, thyme, black pepper, and Worcestershire sauce if using.
  5. Pour in the chicken broth and heavy cream, stirring gently. Bring to a light simmer, then reduce the heat, cover, and let cook for about 8-10 minutes, or until the orzo is tender.
  6. Stir in 1 cup each of mozzarella and Parmesan until melted and creamy.
  7. Preheat your oven to 375°F (190°C). Sprinkle remaining mozzarella on top and bake uncovered for 10-15 minutes, until bubbly and golden brown.
  8. Let rest for 5-10 minutes before serving. Optionally, sprinkle fresh herbs on top before serving.

Notes

This casserole stores well in the fridge for up to 3 days. It can also be frozen for 2-3 months. Don't rush the onion caramelization for best flavor. Cheese can be varied according to preference.