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French Onion Chicken Orzo Casserole

A comforting one-pan meal that combines the rich flavors of French onion soup with tender orzo pasta and shredded chicken, perfect for busy weeknights or special occasions.
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Prep Time 10 minutes
Cook Time 55 minutes
Total Time 1 hour 5 minutes
Servings: 6 servings
Course: Dinner, Main Course
Cuisine: Comfort food, French
Calories: 650
Ingredients Method Notes

Ingredients
  

For the caramelized onions
  • 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)
Main ingredients
  • 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
Cheese ingredients
  • 1 1/2 cups shredded mozzarella cheese
  • 1/2 cup grated Parmesan cheese
  • 1/2 teaspoon Worcestershire sauce or balsamic glaze for added depth (optional)

Method
 

Caramelize the Onions
  1. In a large oven-safe skillet or Dutch oven, melt the butter and olive oil over medium heat.
  2. Add the sliced onions, sugar, and salt. 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.
Add Orzo and Chicken
  1. Stir in the orzo and cook for 2 minutes, allowing it to lightly toast.
  2. Add the shredded chicken, thyme, pepper, and Worcestershire sauce if using. Mix well.
Pour in Liquids
  1. Add the chicken broth and cream. 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.
Add Cheese
  1. Stir in 1 cup of mozzarella and the Parmesan cheese. Mix until melted and creamy.
Bake the Casserole
  1. Preheat the oven to 375°F (190°C).
  2. Sprinkle the remaining 1/2 cup of mozzarella over the top.
  3. Bake uncovered for 10–15 minutes until bubbly and golden on top.
Serve
  1. Let it rest for 5–10 minutes before serving. Garnish with fresh thyme or parsley if desired.

Notes

For best results, use fresh onions and let them caramelize slowly for a richer flavor. For a lighter dish, substitute heavy cream with half and half or a lower-fat milk. Make it a one-pot meal by using a large skillet that can go from stovetop to oven. Add some vegetables like spinach or mushrooms to boost nutrition. Experiment with different cheese varieties for new flavor profiles.