In a medium saucepan, heat the olive oil and add the onion, garlic and jalapeno
Cook on a medium heat for 3-5 minutes until soft
Peel and chop the choko into small pieces
Add the choko to the saucepan and cook for another 5 minutes, stirring occasionally
Add the vegetable stock, season with the salt and pepper, then bring to the boil and cover with a lid. Simmer for 15-20 minutes until the choko is soft
Remove from the heat and allow to cool slightly before blending.
Blend the soup with either a hand blender or upright blender until smooth