Make ahead
• The bolognese sauce and béchamel can be made up to 2 days ahead. Refrigerate in separate airtight containers, placing a sheet of plastic wrap or parchment paper directly onto the surface of the béchamel to prevent a skin from forming before sealing the container. Gently reheat each sauce until warmed through before assembling the lasagna.
• The lasagna can be assembled up to 1 day ahead before baking. Let cool completely, cover, and refrigerate. Let sit at room temperature for 30 minutes before baking uncovered.
Storage: Refrigerate leftovers in an airtight container for up to 3 days, or freeze for up to 3 months.
Helpful Swaps
• No-boil noodles (which Maria, Jeanette, and our cross-tester, Christine, happen to like) work quite well as an alternative to regular dried lasagna noodles, and do a nice job of mimicking the texture of more thin, fresh lasagna noodles. If using no-boil noodles, you’ll need just enough for the three layers of pasta (a 9-ounce box of Barilla noodles was sufficient for me), and there’s no need to soak them before assembling.
• Canned diced tomatoes (and the juices) or whole peeled tomatoes can be used as a substitute for crushed tomatoes. Be sure to crush the whole tomatoes with your hands or use an immersion blender or regular blender to break them down first.
Storage and Make-Ahead Tips
• The bolognese sauce and béchamel can be made up to two days ahead. Refrigerate in separate airtight containers, placing a sheet of plastic wrap or parchment paper directly against the surface of the béchamel to prevent a skin from forming before sealing the container. Gently reheat each sauce until warmed through before assembling the lasagna.
• The lasagna can be assembled up to 1 day ahead before baking. Let cool completely, cover, and refrigerate. Let sit at room temperature for 30 minutes before baking uncovered.
• Good news: Leftover lasagna freezes well, both unbaked and baked, and keeps for up to three months.
• There are several ways to reheat lasagna. Reheating in a 325°F oven is your best bet, though the microwave can also get the job done.