*Bolognese sauce can be made 2 days ahead. Cover and chill.
**Pasta dough can be made one day ahead, Bring to room temperature before rolling out. OR, make and boil pasta sheets, then stack each sheet between layers of parchment paper on a baking sheet. Wrap baking sheet with plastic wrap and chill until ready to assemble lasagna..
*** Bechamel sauce can be made one day ahead. Just reheat until loose, but not hot, when ready to assemble lasagna.
-For a 6 layer lasagna, double the Bechamel and Bolognese,,and add 1½ more cups of Parmiagiano-Reggiano cheese. You will also need enough pasta dough for about 18 lasagna sheets,
- If your Bolognese sauce is a little dry for some reason, like your oven running hot, just stir in a little tomato sauce and/or stock to bring it back. On the flip side. if it still seems too saucy after cooking, it's okay, it will thicken up as it cools. If it doesn't thicken up, in a pot on the stove top, cook it down over medium - high heat, constantly stirring, until the extra sauce reduces.