Curried Sweet Potato Ravioli

The sweet potato filling used here has a myriad of other uses: by itself as a garnish for roasted meats, as a filling in deep-fried wontons, or as a soup base, thinned with stock and cream to make a lovely soup. I particularly like it in these ravioli, which are served here in a simple stock; they could also be tossed with fresh herb butter and a little grated Parmesan or pecorino cheese.