Curried split-pea soup with squash and raisins

I picked up the squash for this soup at the farmers market in the Strip District this morning. I've no idea what kind it is, but in its pre-cut state, it looks a little like a mini-watermelon that swallowed one of those Star Men from Super Mario Brothers. Also, can I just say that starting today, I am a big fan of raisins in soup?

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