I found this info:
Quote:
How long can you keep cooked burgers on the counter?
Whether it’s been barbecued, baked, fried, or thrown on a hot sidewalk in the middle of a heat wave, cooked meat shouldn’t be left at room temperature for more than 2 hours. After 2 hours, human-unfriendly bacteria starts to grow on the meat, making it an unhealthy, highly unpleasant snack and all-around bad idea to mess with.
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http://wwff.wordpress.com/2007/03/26...-will-it-last/
That should also apply to lasagna, because they both have meat. If they think you are weird, so what. Feed you and your baby something else because that lasagna will make you sick.