Cut the ends off the butternut squash and peel with a vegetable peeler. Cut it in half lengthways. Scoop out the seeds. Cut squash halves into slices, then cut into 1-inch sized cubes.
Place cubed butternut squash into a roasting tray. Toss in 1 tablespoon of the olive oil. Sprinkle over the chopped red chilli. Season with salt and pepper. Roast in the oven for about 30 minutes until softened.
Add the stock to the saucepan and allow to simmer gently for 2 - 3 minutes. Then add in the cubes of cooked butternut squash and stir in the crème fraiche. Simmer for a further five minutes.
Blitz the contents of the saucepan using a hand blender / blender or food processor and return to the pan. Season to taste.
Reheat if required and serve garnished with a pinch of the red chilli flakes.