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baking dish full of french onion sausage casserole ready to serve

French Onion Sausage Casserole

French Onion Sausage Casserole is a dish that brings warmth, comfort, and a touch of elegance to every time I put it on the table. Its rich flavors and inviting aroma make it a standout choice for any occasion.
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Prep Time 1 hour
Cook Time 30 minutes
Course Main Course
Cuisine French/American
Servings 6
Calories 732 kcal

Ingredients
  

  • ⅓ cup butter
  • 1.2 kg (2.5 pounds) onion, sliced
  • 400 g (14 oz) italian sausages, sliced
  • 2 bay leaves
  • 2-3 thyme sprigs
  • 1 baguette sliced
  • ⅓ cup all-purpose flour
  • 3 cups beef stock
  • 2 cups gruyere cheese shredded

Instructions
 

  • Preheat the oven to 180C/350F.
  • Heat some olive oil in a large pan. Brown sausages and remove cooked pieces onto a plate.
    400 g (14 oz) italian sausages, sliced
    sausage being cooked to make the filling for french onion sausage casserole
  • Add butter into the same pan without washing it. Add sliced onions, salt, pepper, bay and thyme. Caramelize onions over low heat, mixing frequently, for around an hour.
    ⅓ cup butter, 1.2 kg (2.5 pounds) onion, sliced, 2 bay leaves, 2-3 thyme sprigs
    french onion sausage casserole filling being made in a pot
  • Add sausages back into the pan, sprinkle flour on top, mix well. Gradually pour in beef stock and bring liquid to a boil.
    ⅓ cup all-purpose flour, 3 cups beef stock
    pot of ingredients being combined to make a filling for a french onion sausage casserole
  • Grill sliced baguette until crispy. Layer half of baguette slices into the casserole dish, pour onion and sausage mixtures over and cover with more baguette. Sprinkle with cheese. Bake for 30 minutes.
    1 baguette sliced, 2 cups gruyere cheese
    layering sausage and sauce in a baking dish with slices of bread to make french onion sausage casserole

Nutrition

Calories: 732kcalCarbohydrates: 46gProtein: 32gFat: 47gSaturated Fat: 23gPolyunsaturated Fat: 4gMonounsaturated Fat: 17gTrans Fat: 0.4gCholesterol: 126mgSodium: 1.386mgPotassium: 783mgFiber: 5gSugar: 11gVitamin A: 754IUVitamin C: 17mgCalcium: 561mgIron: 3mg
Keyword casserole, cheese, french, onion, sausage
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