CELERY-ROOT SOUP WITH BACON AND GREEN APPLE

Celery-Root Soup with Bacon and Green Apple image

Yield Makes 4 servings

Number Of Ingredients 14

3 medium leeks (3/4 lb), white and pale green parts only
3 bacon slices (2 oz)
1 tablespoon olive oil
1 1/2 lb celery root, peeled with a knife and cut into 1/2-inch pieces
3 cups water
1 3/4 cups reduced-sodium chicken broth
1 Granny Smith apple
3/4 celery rib, very thinly sliced on a long diagonal (1/2 cup)
1/3 cup inner celery leaves
1 teaspoon salt
1/4 teaspoon black pepper
1/2 cup half-and-half
Special equipment:
Special equipment: an adjustable-blade slicer

Steps:

Halve leeks lengthwise, then coarsely chop. Wash leeks in a bowl of cold water, agitating them, then lift out onto paper towels and pat dry.
Cook bacon in a 4-quart heavy pot over moderate heat, turning occasionally, until crisp, 6 to 8 minutes. Transfer to paper towels.
Pour off all but 2 teaspoons fat from pot, then add oil and cook leeks over moderate heat, stirring occasionally, until softened, about 6 minutes. Add celery root and cook, stirring, 2 minutes. Add water and broth and bring to a boil, then reduce heat and simmer, uncovered, until celery root is very tender, 35 to 40 minutes.
While soup simmers, thinly slice apple lengthwise into 1/8-inch-thick slices with slicer, working around core, then cut slices into 1/8-inch matchsticks with a knife. Gently toss with celery and celery leaves.
Purée soup in batches in a blender until smooth (use caution when blending hot liquids), transferring to a bowl. Return soup to cleaned pot. (If soup is too thick, thin with 1/2 to 3/4 cup water.) Stir in salt, pepper, and half-and-half and cook over moderately low heat, stirring occasionally, until warm. Season with salt, then divide among 4 bowls and top with apple-celery mixture and coarsely crumbled bacon.