131 Sorrel and Watercress Purée

Main ingredients

• 2 bunches watercress
• 200 g (7 oz) fresh sorrel

1. Remove the stalks from the sorrel, wash it well in running water and dry it in a cloth. Pick over and wash the watercress.
2. Heat the saucepan, put in the sorrel and watercress and let them sweat gently, stirring with a wooden spoon or spatula, until all the water which is given off has completely evaporated.
3. Add the sugar substitute, wine vinegar, salt