Heat oven to 375°F.
Toss the chopped veggies in the olive oil and season.
Place in a baking dish and roast in the oven for half an hour, shaking the dish half way through.
Remove from the oven and allow to cool. Place the cooled veggies in the food processor and add the rest of the ingredients except the water. I like to process until the mixture is slightly chunky.
Slowly add water until you reach your desired thickness. Check for seasoning.
Chill well. The soup is best the next day when the flavours have all developed.
Serve with lots of fresh herbs and crispy sourdough crumbles.