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French Onion Chicken Casserole

Nicole Harris of

Cook Time: 50 min
Family Favorites Buffet Main Dishes Party food Chicken Pasta Bake Sauté


  • Onions
    • 2 Pounds Sweet Onions – sliced into strips
    • 2 Tablespoons Thrive® Culinary Algae Oil
    • Salt/Pepper
  • Chicken
    • 1 Pound Boneless, Skinless Chicken Breast – cut into bite-sized chunks
    • 2 Tablespoons Thrive® Culinary Algae Oil
    • Salt/Pepper
  • Sauce
    • 2 Tablespoons Butter
    • 2 Tablespoons Flour
    • 1 Cup Heavy Cream
    • 1 Cup Whole Milk
    • Salt/Pepper
    • 1 Cup Shredded Mozzarella Cheese
  • Casserole
    • 16 Ounces Ziti Pasta – cooked according to package instructions
    • 2 Cups Shredded Mozzarella Cheese


  1. Onions: In a large skillet over medium heat, combine onions, oil, salt and pepper. Cook and stir frequently for 30-35 minutes or until golden brown. Set aside.
  2. Chicken: Add more oil to pan and increase heat to high. Sprinkle chicken with salt and pepper then add to pan. Brown chicken pieces and heat until almost cooked through. Do not over cook chicken because it will be baking in the casserole as well. Set aside.
  3. Sauce: Decrease heat to medium/high. Melt butter then stir in flour. Cook while stirring for 1 minute. Add milk, cream, salt and pepper. Stir and cook until sauce is bubbling and thickened (about 5 minutes). Remove pan from heat and stir in mozzarella until melted.
  4. Preheat oven to 375°F
  5. Toss cooked pasta with sauce until evenly coated. Add chicken and onions, stir.
  6. Transfer mixture to a 9×13 casserole dish. Top with additional mozzarella.
  7. Bake for 15 minutes. Broil on high for 1-2 minutes to brown top.

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