Preheat the oven to 400F (200C)
In a large roasting tray, combine the tomatoes, peppers, onion, chilli and garlic with 2 tablespoons of oil and 1/4 teaspoon of salt and pepper.
Spread everything out, place the Boursin in the centre, then roast for 25-30 minutes until the veg is soft and lightly charred. If you notice the Boursin charring too quickly, just pop a piece of foil over it.
Let everything cool for a few minutes, then add to a blender with the basil, sun dried tomatoes and stock.
Leave the hole at the top open and pop a clean tea towel over the top. Pulse until smooth.
Adjust the seasoning to taste and thin out with more stock if you need to. Alternatively, you can add everything to a pot and use a hand blender to blend until smooth.
To warm up or thicken the soup, just gently simmer and stir over low-medium heat.