Cream of Celery and Cauliflower Soup

I have been using my treadmill again and have been looking through cookbooks while working out. The cookbook is called: A Taste of Appleby. It came in a box lot of cookbooks bought at an auction.
The soup was great. I will be making it again for sure.

Cream of Celery and Cauliflower Soup

Ingredients:

1/3 cup butter
1 onion, chopped
4 celery stalks, chopped
2 cups cauliflower florets
1/3 cup unbleached flour
4 cups chicken stock
1 cup cream
salt and pepper
chopped scallion for garnish/or parsley

Directions:

In large pot, melt butter. Add onion, celery and cauliflower; when this is softened cover pot and simmer for about 20 minutes.
Take the vegetables and put in blender or food processor and puree. ( I left it a bit chunky) Return to pot and stir in flour, mix thoroughly and cook until flour is cooked.
Slowly stir in chicken stock and bring to boil for 2 minutes.
Remove from heat and stir in cream.
Soup can be heated but do not boil.
Season to taste and add garnish.
Serves 6