Heat the olive oil in a saucepan, add the onion and fry for 5 minutes
Add the garlic, chilli and mixed herbs and cook for a further 5 minutes
Once the onion mixture has cooked, add the squash and stir to coat the squash with the mixture
Add the vegetable stock, bring to the boil, then reduce the heat and simmer for 30 minutes
Once the squash is tender, remove from the heat and allow to cool
Blitz the soup with a stick blender, or transfer to a jug blender and whizz until smooth.
To serve, reheat the soup on the hob for a few minutes, then serve with fresh chillies and pumpkin seeds as garnish