Spinach and Sorrel Soup
Adapted from the book Vegetables from Amaranth to Zucchini by Elizabeth Schneider. Serves 4 as a first course.
2 tsp olive or sunflower oil
1/2 sweet onion, minced
3/4 lb small, tender spinach, stems removed
5-6 ounces sorrel
3 1/2 cups chicken or vegetable broth
salt and pepper
1 1/2 TB cornstarch
big pinch of ground nutmeg or ground anise
1/2 tsp grated lemon zest
lemon juice
6 TB heavy cream
Heat oil over medium heat in a heavy-bottomed pot. Add onions and saute for 3 minutes, until translucent. Add greens and stock. Bring to a boil, stirring. Simmer until soft, about 5 minutes. Season to taste with salt and pepper. Puree soup until smooth with an immersion blender. Or, transfer to a blender or food processor and puree. Stir together cornstarch with 1/4 cup of the puree. Combine in pot with remaining soup. Bring to a boil over moderate heat, stirring constantly. Add nutmeg, zest and juice. To serve, ladle into bowls. Drizzle 1 1/2 TB heavy cream onto each, then swirl gently with knife tip or fork to form a pretty pattern.