Let’s say you’re feeding a crowd, or you’re a hero who made an entire 9x13 pan. Do not—I repeat, do not—try to microwave the whole thing at once. You will create a heat shadow in the center that could power a cold fusion reactor.
Instead, cut it into individual squares. Reheat them one at a time (or two, if you’re brave). Each square needs that same 2.5 minutes at 60% power, with a mid-point fork stab. It’s tedious, but so is eating a lasagne that’s room temperature in the middle and magma on the edges.
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Here’s where I blow your mind: after the microwave beeps, leave the lasagne in there for two more minutes. Don’t open the door. Don’t peek. Let it rest. This is called “carryover cooking,” and it’s physics’ way of apologizing for microwaves being so aggressive.
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During this stand time, the outer layers cool slightly while the heat finishes traveling to the center. The result? A uniformly hot, soul-warming slice of heaven. You will feel like a culinary god. You will also have to wait two more minutes while you drool on the counter.
