One-of-Each Soup

INGREDIENTS

• 1 large apple (preferably Granny Smith), peeled and coarsely chopped
• 1 rounded teaspoon curry powder
• 1 medium onion, coarsely chopped
• 1 tablespoon chopped fresh chives
• 1 firm-ripe banana, coarsely chopped
• 1 tablespoon unsalted butter
• 1 teaspoon salt
• 1 pint chicken broth
• 1 celery heart (inner pale stalks with leaves), coarsely chopped (1/2 cup)
• 1 large boiling potato (1/2 lb), peeled and coarsely chopped
• 1 cup heavy cream