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Top-down view of French Onion Chicken Orzo showing charred Gruyere cheese and seared chicken breasts.

French Onion Chicken Orzo: The Ultimate One-Pan Comfort Casserole

This French Onion Chicken Orzo combines tender pasta with a savory onion gravy, juicy seared chicken, and a bubbly, charred Gruyère cheese topping. A high-protein, umami-rich dinner perfect for enthusiastic home cooks seeking comfort food excellence.
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Prep Time 20 minutes
Cook Time 40 minutes
Total Time 1 hour
Servings: 4 people
Course: Dinner, Main Course
Cuisine: French-American Fusion
Calories: 585
Ingredients Equipment Method Notes

Ingredients
  

Ingredients
  • 1.5 lbs Boneless Skinless Chicken Breasts approx 680g
  • 1.5 cups Orzo Pasta 330g dry
  • 3 large Yellow Onions thinly sliced
  • 2 tbsp Butter 30g
  • 3 cups Beef Broth 710ml
  • 1/4 cup Heavy Cream 60ml
  • 1 tbsp Balsamic Vinegar 15ml
  • 1.5 cups Gruyère Cheese 150g, freshly shredded
  • 1 tbsp Fresh Thyme Leaves Garnish

Equipment

  • 1 Heavy-bottomed Skillet Cast iron preferred for searing
  • 1 Ceramic Baking Dish 9x13 inch size

Method
 

Prepare the Chicken
  1. Season chicken with salt and pepper. In a large skillet over medium-high heat, sear in oil for 3-4 minutes per side until a golden-brown crust forms. Remove and set aside.
Caramelize and Build Sauce
  1. In the same skillet, add butter and onions. Cook on medium for 20-25 mins until dark brown and soft. Deglaze with balsamic vinegar.
  2. Add orzo and flour to onions, stirring for 2 mins. Gradually whisk in beef broth and heavy cream until a light brown gravy forms.
Bake and Broil
  1. Transfer mixture to a baking dish. Top with chicken and Gruyère. Bake at 400°F (200°C) for 15 mins, then broil for 2-3 mins until cheese has charred spots.

Notes

Use freshly shredded Gruyère for the best melt.
Don't skip the resting period; it helps the sauce thicken around the orzo.