Yes, you guessed correctly, I found pieces of onions. But not as you would expect. I found onion skins. They had glued themselves along the walls of the disposal, clinging to all sorts of unsavory items as they made their way down the chute. The skins had been too lightweight to grind up and who knows how long they had survived down there.
I managed to pull them out with tongs and a spoon and resolved to just toss my discarded onion bits in the trash bin from now on.
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