This rich and cozy casserole combines caramelized onions, tender chicken, creamy orzo, and melted cheese for the ultimate comfort food dinner.
3 large yellow onions (about 1 1/2 pounds / 680 g), sliced
2 tablespoons (30 ml) olive oil
1 tablespoon (14 g) unsalted butter
1/2 teaspoon (3 g) salt
1/4 teaspoon (1 g) black pepper
1 teaspoon (5 g) fresh thyme
2 cups (360 g) dry orzo pasta
2 cups (480 ml) low-sodium beef broth
1 cup (240 ml) low-sodium chicken broth
1 1/2 cups (360 ml) whole milk
2 cups (280 g) shredded cooked chicken
1 1/2 cups (170 g) shredded mozzarella cheese
1 cup (110 g) grated Gruyère-style cheese
1 clove garlic, minced
Caramelize onions in olive oil and butter for 25–30 minutes. Add thyme and garlic.
Stir in orzo, beef broth, chicken broth, and milk. Simmer 8–10 minutes.
Fold in chicken and 1 cup (110 g) Gruyère-style cheese.
Top with mozzarella and bake at 375°F (190°C) for 15–20 minutes until golden and bubbly.
Cook onions slowly for best flavor.
Add milk when reheating to maintain creaminess.
Can be assembled ahead and baked later.