1kilo tomatoes - roughly chopped (quarters is fine)skins removed if you are blending rather than using the food mill - you will need 1.5 kilos if using cherry tomatoes
2largesweet onions - finely chopped
2mediumcarrots - grated
1mediumsweet red pepper (finely sliced)
1fresh banana chilloptional
1ribcelery very finely sliced (including leaves)
1mediumpotato (about 100 g)
1pinch saffron
1bay leaf
small strip of orange peel
500 plusmlvegetable or chicken stock
2tbspconcentrated tomato paste
olive oil
freshly ground black pepper and salt
Instructions
In a large, heavy-based pan, add the olive oil. When warm, add the grated carrot, onions, red pepper, bay leaf, orange peel, potato, and celery.
Sauté until soft and translucent, then add the tomatoes (fresh, canned or sauce), garlic and saffron. Season with black pepper, then simmer until the tomatoes have dissolved and broken down, forming a gooey sauce.
Remove the bay leaf and orange rind. Push all the sauce through a food mill or sieve, or if you have peeled the tomatoes, by all means, puree with a stick blender.
At this point, you can freeze the sauce and finish seasoning when you're ready to use it. The tomato sauce is not suitable for bottling because it contains olive oil.
To finish the soup, return the sauce to a large pan. Add a tbsp of the tomato paste and 200ml of the stock. Bring to the boil and simmer. Add a tbsp of sherry vinegar and taste to see if you need to add more salt, pepper, stock, or a little more tomato paste. It varies depending on the quality of the tomatoes and how rich, thick, or thin you want the soup to be.
To serve - season with a little more chilli, then swirl in yoghurt or crème fraîche.