recipeName: broccoli and sweet potato soup
ingredients: 1 brown onion, finely chopped 500g broccoli, stems finely chopped, florets coarsely chopped 500g sweet potato, peeled, finely chopped 4 cups  vegetable stock 1/2 cup greek-style yoghurt
steps: heat a medium saucepan over medium heat. add the onion, broccoli stems and sweet potato and cook, stirring, for 5 mins or until the onion softens. add the stock and 2 cups (500ml) water. bring to the boil. reduce heat to low. add broccoli florets. cook for 15 mins or until sweet potato is tender. set aside to cool slightly. use a stick blender to carefully blend the soup until smooth. divide among serving bowls. place yoghurt in a small bowl and stir in 2 tablespoons water. add to the soup and gently swirl. season.
NER: brown onion broccoli sweet potato vegetable stock greek yoghurt