Start by baking your butternut squash face down on a tray for 45 minutes until fork-tender. With a large metal spoon or an ice cream scoop, you can easily scrape out the seeds, and scoop out the flesh.
Blend together 2 cups of butternut squash flesh with the double cream. You can use single cream if you prefer.
Separately, cook your pasta al dente and remember to keep the pasta water aside.
In a pan, sauté the garlic with olive oil and add the dried sage, ground cinnamon, ground nutmeg, chilli flakes, dried oregano and salt.
Add the blended butternut squash and cream to the pot, let it simmer together and heat for 1-2 minutes.
Add 1 cup of pasta water and all the grated cheese to the sauce.
Mix together well until you get a pasty thick sauce and add your al dente pasta to the pan.