01 -
Peel and finely chop the onions. Sauté them in hot olive oil. Toss in the ground beef and cook it through. Stir in the crushed tomatoes, Provençal herbs, salt, and pepper. Cover and let simmer for 30 minutes, giving it a stir every so often.
02 -
Melt the butter in a pot. Whisk in the flour and cook for about 2 minutes. Gradually pour in the cold milk, stirring continuously. Add nutmeg, salt, and pepper for seasoning. Cook it while mixing until it thickens.
03 -
Set your oven to preheat at 200°C. Grease a baking dish and start layering—pasta sheets, meat sauce, béchamel, and grated Gruyère. Repeat this process three to four times, ending with Gruyère on top. Bake for 30 minutes.