Pre-heat the oven to 200℃ (400℉).
Add the tomatoes, onions, chilies and parsley to a baking dish and liberally sprinkle with olive oil.
Cook for around 25-30 minutes, just until the vegetables have softened (if you leave them in the oven for too long, you will evaporate the juices, which help flavour the soup).
Blitz in soup in a blender or food processor until smooth.
Add to a pan along with the stock and cream. Taste and add more seasoning if required.
Bring to the boil and serve immediately.
Sprinkle over some fresh herbs, if you like (I ripped a few stalks of parsley), and serve with some warm bread.