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Savor Comfort with This Irresistible French Onion Lasagna

Experience comfort with layers of gooey cheese, creamy béchamel, and caramelized onions in this delightful French Onion Lasagna.
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Prep Time 30 minutes
Cook Time 40 minutes
Cooling Time 10 minutes
Total Time 1 hour 20 minutes
Servings: 8 slices
Course: Dinner
Cuisine: French
Calories: 450
Ingredients Equipment Method Nutrition Notes

Ingredients
  

For the Noodles
  • 12 noodles Lasagna Noodles Choose no-boil noodles for added convenience.
For the Onions
  • 4 tablespoons Butter Essential for sautéing onions.
  • 4 cups Onions Thinly sliced; can swap with shallots.
For the Cheese
  • 2 cups Gruyère Cheese Melts beautifully.
  • 1 cup Parmesan Cheese Adds depth to the cheesy profile.
For the Béchamel Sauce
  • 4 tablespoons Butter Creates the base for a creamy béchamel.
  • ¼ cup Flour Thickens the sauce.
  • 2 cups Milk Main liquid for the béchamel.
For the Crunchy Topping
  • 1 cup Croutons Introduces a delightful crunch.
For Seasoning
  • to taste Salt
  • to taste Pepper
  • 1 teaspoon Thyme For an aromatic touch.

Equipment

  • Lasagna Pan
  • skillet
  • Saucepan
  • whisk

Method
 

Preparation
  1. Preheat your oven to 375°F (190°C). Lightly grease a lasagna pan with butter.
  2. In a large skillet, melt 4 tablespoons of butter over medium heat. Add thinly sliced onions, sprinkle with salt, and sauté for 20-25 minutes until caramelized.
  3. In a medium saucepan, melt 4 tablespoons of butter over low heat. Whisk in ¼ cup of flour and cook for 2-3 minutes until bubbly. Gradually add 2 cups of milk, whisking constantly for 5-7 minutes until thick.
  4. Spread a thin layer of béchamel on the bottom of the pan. Layer in noodles, caramelized onions, béchamel, and cheese. Repeat, finishing with cheese on top.
  5. Optionally, sprinkle croutons over the top layer for extra crunch.
  6. Bake the lasagna for 35-40 minutes until the cheese is melted and golden brown.
  7. Remove from the oven and let cool for 10 minutes before slicing.

Nutrition

Serving: 1sliceCalories: 450kcalCarbohydrates: 40gProtein: 25gFat: 25gSaturated Fat: 15gPolyunsaturated Fat: 2gMonounsaturated Fat: 7gCholesterol: 80mgSodium: 800mgPotassium: 450mgFiber: 2gSugar: 5gVitamin A: 500IUVitamin C: 10mgCalcium: 300mgIron: 3mg

Notes

Enhance flavor with fresh herbs; allow cooling time to maintain layers when serving.

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