Ingredients
3
cups low-sodium low-fat chicken broth (24 fl oz)
2
tsp finely grated fresh lemon zest
1
large egg, lightly beaten
1
cup firmly packed shredded spinach leaves
Directions
1.
Stir together cornstarch and 1/4 cup water until smooth.
2.
Bring broth and remaining 3/4 cup water to a boil in a 2- to 3-quart heavy saucepan over high heat, then reduce heat to moderately high and add zest and salt.
3.
Stir cornstarch mixture and add to soup, whisking until smooth. Simmer, whisking, 2 minutes, then add egg in a slow stream, stirring with a spoon. Stir in spinach and return to a boil, then remove from heat. Season with salt.