Curried Carrot Soup

Name: Curried Carrot Soup
Ingredients: 3 tablespoons canola oil; 2 teaspoons curry powder; 8 medium carrots, peeled and thinly sliced; 4 medium stalks celery, thinly sliced; 1 medium onion, coarsely chopped; 5 cups reduced-sodium chicken broth; 1 tablespoon lemon juice; ½ teaspoon salt; Freshly ground pepper, to taste