Perfect Lasagna Bolognese
Sometimes I like to bake the sauce, covered, for 3 1/2 hours at 275 degrees F (135 degrees C) for a deeper flavor. After that, I take it out, add the milk and heavy cream, and finish simmering it on the stove.
Remember to always prick each pasta sheet when assembling the lasagna; this prevents air bubbles from forming when baking.
To prevent sticking, either butter aluminum foil or make sure it does not touch the cheese.