Carrot Fennel Soup

Name: Carrot Fennel Soup
Ingredients: 2 medium fennel bulbs with fronds; 1 pound carrots, quartered lengthwise; 1 medium onion, quartered; 1 garlic clove; 5 tablespoons extra-virgin olive oil, divided; 1/2 teaspoon sugar; 2 1/2 cups reduced-sodium chicken broth; 2 1/2 cups water; 1 teaspoon fennel seeds; Equipment: an electric coffee/spice grinder