Method
Step 1: Prepare the Ragù
Heat olive oil in a large sauté pan. Sauté the onion, carrot, and celery until soft.
Add the ground meat and cook until browned.
Deglaze with white wine, letting it evaporate.
Stir in the crushed tomatoes, tomato paste, salt, and pepper. Simmer for at least 1.5 hours, stirring occasionally. Add milk towards the end for a creamy texture.
Step 2: Make the Béchamel
Melt butter in a saucepan over medium heat. Stir in flour and cook for 2 minutes.
Gradually whisk in warm milk to avoid lumps. Cook until thickened.
Season with nutmeg and salt.
Step 3: Assemble the Lasagna
Preheat oven to 180°C (350°F).
Spread a thin layer of ragù on the bottom of the baking dish. Top with lasagna sheets, a layer of ragù, béchamel, and grated Parmigiano.
Repeat layers until all ingredients are used, finishing with béchamel and Parmigiano on top.
Step 4: Bake
Cover with foil and bake for 30 minutes. Remove foil and bake for another 20 minutes until bubbly and golden.
Let stand for 15 minutes before slicing.
Variations and Substitutions
Vegetarian: Substitute the ragù with lentil or mushroom-based sauce.
Gluten-Free: Use gluten-free lasagna sheets and swap regular flour in béchamel with a gluten-free alternative.
Dairy-Free: Replace milk in béchamel with almond or soy milk, and use vegan cheese.