Cream Of Watercress Soup - cooking recipe

Ingredients

1 medium onion, diced
1 small potato, diced
25 g butter
85 g watercress, rinsed
300 ml milk
300 ml vegetable stock
4 tablespoons double cream (heavy)

Preparation

Melt butter and saute onion until transparent.
Add potato, watercress, milk and stock.
Bring to boil, cover and simmer for 20 minutes
Blend in a processor.
Add cream and seasoning. Heat if needed.