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To serve:
Blend one can of cannellini beans with 300 ml / 1/2 pint of vegetable stock to make a coarse paste. Stir in the whole beans, chopped tomatoes, and tomato puree and remaining vegetable stock and bring to the boil. Reduce the heat and simmer for about 30 minutes until all the vegetables are tender. Stir in the pesto, making sure it is evenly distributed. Season to taste.
Serve the soup hot, garnished with basil, with warm crusty bread.
posted by Mr Falafel