Butternut Squash Ravioli with whites

1 teaspoon olive oil 1 small onion , finely chopped (4-6oz) 12 ounces frozen winter squash 1/4 cup freshly grated parmesan cheese 2 tablespoons plain dried[...]

5 tablespoons unsalted butter 1/4 teaspoon crushed red pepper flakes 1 1/2 cups butternut squash 1/4 cup amaretto cookie crumbs salt 2 egg yolks 1/2 cup[...]