To make them even more tasty and softer, you can add flakes of butter to each layer of pasta in the lasagna. Rather than buy the béchamel sauce ready-made in the supermarket, you can make it at home with this easy recipe: just melt 100g of butter in a small saucepan and then add 100g of sifted flour, creating a ‘roux’. Cook for a few minutes and then remove the pan from the heat, add 1 litre of warm milk, a sprinkling of nutmeg, and salt.