Ingredients 
Preparation time 10-15 minutes

1 Bunch of Celery, roughly chopped
1 Onion
500ml Good quality, low sodium Chicken or Vegetable stock
1 Bay Leaf
Salt and Pepper to taste

Method:

1. Heat pan and spray lightly with Olive Oil. Lightly sweat onion until clear. Add celery, cook for 3 minutes
2. Add stock, bay leaf, bring to simmer. Cook Slowly for 15 mins
3. Remove Bay Leaf, puree in food processor until smooth
4. Bring back to boil and season to own taste
5. Put soup in bowl and serve