This soup was easy and delicious but I don't think it was really a watercress soup. The directions call for 2 SMALL potatoes 11/2lbs??????? I even added more watercress but I still didn't get a green soup like the picture. I will try again with less than 11/2 lbs of potatoes and hope for a more watercress taste.
Puree of Watercress Soup
The secret to keeping this soup a beautiful bright green is to add the watercress and parsley in the last step. You could also make this soup with spinach or sorrel instead of watercress.
- 2 tablespoons unsalted butter
- 2 tablespoons olive oil
- 1 large sweet onion (such as Vidalia or Walla Walla), chopped
- 2 small russet potatoes (about 1 1/2 pounds), peeled and chopped
- 4 celery ribs, chopped (about 2 cups)
- 4 cups low-sodium chicken or vegetable broth, plus more for thinning soup
- 1 cup milk, plus more for thinning soup
- 1 1/2 teaspoons sea salt
- 1/2 to 1 teaspoon freshly ground pepper
- 4 cups torn watercress, rinsed and drained
- 1/4 cup chopped fresh parsley
- Garnishes: sour cream or crème fraîche, parsley, watercress leaves
- 1. Melt butter and oil in a large saucepan over medium heat. Add onion; reduce heat to medium-low, and sauté, stirring occasionally, 10 minutes or until onion is tender. Add potato and celery, and cook, stirring occasionally, 5 minutes.
- 2. Add broth and next 3 ingredients; bring to a low boil over medium-high. Reduce heat; simmer 25 to 30 minutes or until potato is tender. Remove from heat; stir in watercress and parsley. Let cool slightly.
- 3. Pour soup in 2 batches into bowl of a food processor or blender, and puree until very smooth. (Or puree soup directly in pot with an immersion blender.) Pour soup back in pot to warm if serving hot, or refrigerate until ready to serve. Before serving, if soup is too thick, add more milk or stock. Garnish, if desired.
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