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French Onion Chicken Orzo Casserole

A comforting mixture of caramelized onions, tender chicken, and creamy orzo pasta topped with gooey cheese, perfect for family dinners.
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Prep Time 10 minutes
Cook Time 50 minutes
Total Time 1 hour
Servings: 6 servings
Course: Dinner, Main Course
Cuisine: American
Calories: 600
Ingredients Method Notes

Ingredients
  

For the Onion Mixture
  • 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)
For the Casserole
  • 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 lighter option)
  • 1 1/2 cups shredded mozzarella cheese
  • 1/2 cup grated Parmesan cheese
  • 1/2 teaspoon Worcestershire sauce or balsamic glaze (optional, for added depth)

Method
 

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

Notes

This casserole is best served with a simple green salad or crusty bread. Stir onions frequently while caramelizing to avoid burning. For a lighter option, substitute heavy cream with half and half. Feel free to add extra vegetables like spinach or mushrooms for added nutrition.