Adapted from Essentials of Classic Italian Cooking by Marcella Hazan (Knopf, 1992)
Serves 6 to 8
Every fall, soups and stews seem to be at the top of everyone’s list after a summer of grilled foods and crisp salads. This is a delicious soup, great to have on hand—because even though it makes a lot, it improves with reheating. Marcella also has a variation served at room temperature, which is good when the weather is warm and the garden is flush with zucchini and green beans.
1 pound unpeeled zucchini, ends trimmed and diced
1/2 cup extra-virgin olive oil
3 tablespoons butter
1 cup onion, sliced very thin
1 cup diced carrots
1 cup diced celery
2 cups peeled, diced potatoes
1/4 pound fresh green beans, topped and cut into small pieces (about 4 to an inch)
3 cups shredded cabbage (savoy or regular green)
1-1/2 cups canned cannellini beans, drained
6 cups chicken stock
2/3 cup canned plum tomatoes with their juice
Salt
1/3 cup freshly grated Parmigiano-Reggiano cheese
Put the oil, butter, and sliced onion into an 8-quart stockpot. Turn the heat to medium-low and cook the onion until it softens and turns a pale gold. Do not let it color more than this.
The diced vegetables are to be added sequentially, not all at once. First, add the carrots and cook for 2 to 3 minutes, stirring once or twice. Next, add the celery and do the same. Then the potatoes, then the green beans, and finally the zucchini.
Cook all together for a few minutes, stirring occasionally. Add the shredded cabbage and continue to cook for another 5 minutes.
Add the chicken stock and the tomatoes with their juice. Check for salt at this point. How much you need will depend on your stock, but be sparing—you can always add more later.
Stir thoroughly, cover the pot, and lower the heat so the soup simmers gently.
After 2-1/2 hours, add the drained cannellini beans. Cook for at least another 30 minutes. The soup should be thick, but if it gets too thick while cooking, it can be thinned with a little water.
When it’s done, turn off the heat and swirl in the grated cheese. Taste and correct for salt. Improves with reheating.