For extra richness, add an additional 1/4 cup broth if the casserole appears dry before baking. Store leftovers refrigerated up to 4 days. Reheat gently with a splash of broth or milk to maintain creaminess.
Ultimate French Onion Chicken Orzo Casserole Ultimate Comfort Dinner
A creamy, cheesy baked casserole featuring tender chicken, caramelized onions, and orzo pasta inspired by classic French onion flavors—perfect for a comforting family dinner.
Ingredients
Scale
2 tablespoons olive oil
3 large yellow onions, thinly sliced (about 4 cups)
1 teaspoon salt, divided
1/2 teaspoon black pepper
2 cloves garlic, minced
2 tablespoons all-purpose flour
1 1/2 cups low-sodium chicken broth
1 cup whole milk
1 teaspoon dried thyme
2 cups cooked chicken breast, shredded
1 1/2 cups uncooked orzo pasta
1 cup shredded mozzarella cheese
1 cup shredded Gruyère cheese (or Swiss cheese)
1/4 cup grated Parmesan cheese
1 tablespoon fresh parsley, chopped
Instructions
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Heat olive oil in a skillet over medium heat. Add sliced onions and 1/2 teaspoon salt. Cook 25 to 30 minutes until caramelized.
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Add minced garlic and cook 30 seconds. Stir in flour and cook 1 to 2 minutes. Gradually whisk in chicken broth and milk. Add remaining salt, pepper, and thyme. Simmer until slightly thickened.
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Preheat oven to 375°F (190°C). Stir shredded chicken and uncooked orzo into the sauce. Transfer to a greased 9×13-inch baking dish.
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Top with mozzarella, Gruyère, and Parmesan cheese.
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Cover with foil and bake 25 minutes. Remove foil and bake 10 to 15 minutes until bubbly and golden. Let rest 10 minutes before serving. Garnish with parsley.