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Description
A hearty and flavorful casserole combining tender chicken with caramelized onions and melted cheese, inspired by classic French onion soup.
Ingredients
- 4 boneless, skinless chicken breasts
- 2 large onions, thinly sliced
- 2 tbsp butter
- 1 tbsp olive oil
- 1 tsp sugar
- 1 tsp salt
- 1/2 tsp black pepper
- 1 clove garlic, minced
- 1 tbsp all-purpose flour
- 1 cup beef broth
- 1 tsp Worcestershire sauce
- 1 cup shredded Gruyère cheese
- 1/2 cup shredded mozzarella cheese
- 1/4 cup grated Parmesan cheese
- 1/2 cup croutons (optional)
- 1 tbsp fresh thyme leaves
Instructions
- Preheat oven to 375°F (190°C).
- Heat butter and olive oil in a large skillet over medium heat.
- Add onions and cook for 10 minutes, stirring occasionally.
- Sprinkle sugar, salt, and pepper over onions. Continue cooking for 15 minutes until caramelized.
- Add garlic and flour. Cook for 1 minute.
- Stir in beef broth and Worcestershire sauce. Bring to a simmer.
- Place chicken breasts in a baking dish. Pour onion mixture over chicken.
- Top with croutons (if using) and all cheeses.
- Bake for 25-30 minutes until chicken reaches 165°F internally.
- Sprinkle with fresh thyme before serving.
Notes
- For deeper flavor, cook onions for up to 45 minutes.
- Substitute Swiss cheese if Gruyère is unavailable.
- Add mushrooms for extra umami flavor.
- Leftovers keep refrigerated for 3 days.
- Prep Time: 20 minutes
- Cook Time: 40 minutes
- Category: Main Dish
- Method: Baking
- Cuisine: French