- For soup:
- 1 small fennel bulb (sometimes called anise)
- 1/4 pound sliced pancetta, chopped
- 1 teaspoon extra-virgin olive oil
- 1 medium onion, chopped
- 1 medium turnip, peeled and cut into 1/2-inch pieces
- 3 medium carrots, peeled and cut into 1/2-inch pieces
- 2 cups chopped cabbage
- 1 (2 inch) piece rind cut from a wedge of Parmigiano-Reggiano (optional)
- 2 small yellow summer squash or zucchini, cut into 1/2-inch pieces
- 1 medium boiling potato, peeled and cut into 1/2-inch pieces
- 2 sprigs fresh thyme
- 1 bay leaf (not California)
- 1 1/2 teaspoons salt
- 9 cups water
- 1 (10 ounce) package frozen baby lima beans
- 1/2 pound haricots verts or other thin green beans, trimmed and cut into 1-inch pieces
- 1 (15.5 ounce) can cannellini or other white beans, drained and rinsed
- 5 ounces baby spinach
- For pistou:
- 3 large cloves garlic
- 1/2 teaspoon kosher salt
- 1 1/2 cups fresh basil leaves
- 1/4 cup extra-virgin olive oil
- 1/3 cup grated Parmesan
- Make soup: Cut fennel stalks flush with bulb, discarding them, and trim off any tough outer layers from bulb. Chop fennel into 1/2-inch pieces.
- Cook pancetta in oil in a 7- to 9-quart heavy pot over moderate heat, stirring occasionally, until just beginning to brown, 5 to 7 minutes. Stir in fennel, onion, turnip, carrots, and cabbage and cook, stirring occasionally, until cabbage is wilted, 5 to 7 minutes. Add cheese rind, squash, potato, thyme sprigs, bay leaf, salt, and water and bring to a boil.
- Reduce heat and simmer, uncovered, 10 minutes. Add lima beans, green beans, and cannellini and simmer until vegetables are tender, about 5 minutes. Discard cheese rind, thyme sprigs, and bay leaf. Stir in spinach and season with salt and pepper.
- Make pistou while soup is simmering: Mince and mash garlic to a paste with salt (or pound with a mortar and pestle). Blend with basil in a food processor until basil is finely chopped. Add oil and cheese and puree.
- Top servings with a spoonful of pistou, then stir.