There is a chilli and butternut squash risotto recipe in the SW Comfort Foods book, which is absolutely delicious!
You do have to keep stirring all the time, which is tedious but oh so worth while.
We found that it is better to cook the butternut squash in advance - 5 minutes in the microwave is about right - as it didn't cook right through by the time the rice was cooked (maybe we didn't cut it small enough). Also, we liked it better without the garlic, but that's all a matter of choice.
Leftovers? Don't be silly!