Creamy broccoli and sweet potato soup

Heat the oil in a large pan, add the onion or leek and gently fry for 3-5 mins.

Add broccoli, sweet potatoes, garlic, water and stock cube, bring to the boil, cover and cook for 30mins until the vegetables are tender.

Blend the soup with a stick blender, add milk and nutritional yeast if using, season to taste with salt and pepper.