New answers tagged cabbage
Though the other answers correctly state that the lid is harmless, what was dropped into the soup was the lid and additionally everything else on that lid. I had once briefly worked at a warehouse that handled, among other things, some food products. There I learned that the outside of the can is no less important than the inside. I have seen rat poison ...
When you can foods, even in a mass production setting, you're pouring near boiling contents into the cans. So heating it in your soup is no different than having used those tomatoes in the soup. If it wasn't food safe it wouldn't be used for canning. It would do no more harm to eat the soup than it would be to eat the tomatoes out of that can.
It's nothing. Since you've already fished it out, you're done having to deal with it, just keep going. No harm will come to you or your dish.
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