So here’s the deal: three to four days is the sweet spot. Day five is pushing your luck. Day six is a gamble. Day seven is a daredevil stunt.
You worked hard on that lasagna (or you begged for it). Honor it. Eat it while it’s glorious. Freeze the rest. And for the love of all that is holy, reheat it the right way.
Now go forth. Eat your lasagna. Smile. And remember: when in doubt, throw it out. Your stomach will thank you. 😉