This recipe is based on the traditional Basque soup called porrusalda, which translates to leek broth. It is usually made with lots of leeks, garlic, and winter squash (sometimes even carrot). This warms the soul during the cold months, but can be just as satisfying in warmer temperatures.
Typically, it is mostly made without any meat, but to enrich it a bit more, many cooks add a couple of pieces of pork rib bones or even chorizo. Here in America’s Test Kitchen version, hot Italian sausage is included to boost the flavor and spiciness and make it a one-pot meal that is hearty and satisfying.

NOTE: Kabocha squash is worth seeking out in this soup, but if you can’t find it red kuri or butternut squash will also work.
Leek, Fennel, and Squash Soup with Sausage

Leek, Fennel, and Squash Soup with Sausage
Ingredients
- 1 lb. hot Italian sausage, casing removed
- 1½ lbs. leeks, white and light green parts only, halved lengthwise, cut into ½-inch pieces, and washed thoroughly
- 1 fennel bulb, halved, cored, and cut into ÂĽ-inch pieces
- 4 garlic cloves, peeled and sliced thin
- 1 Tbsp. extra-virgin olive oil
- ÂĽ tsp. table salt
- 1 bay leaf
- 4 sprigs fresh thyme
- 1½ lbs. kabocha, red kuri, or butternut squash, peeled, seeded, and cut into 1-inch pieces
- 6 cups chicken broth
- 1 15-oz. can cannellini beans, rinsed
- ½ cup finely chopped fresh parsley







Directions
- Trim root end of 1½ pounds leeks and remove tough dark-green ends. Halve lengthwise and cut into ½-inch pieces. Wash and drain thoroughly. Transfer to bowl and set aside.
- Remove stalks and fronds from 1 fennel bulb. Halve bulb, remove core, and cut into ÂĽ-inch pieces. Add to bowl with leeks.
- Halve 1½ pounds kabocha squash. Scrape out seeds, then peel and cut squash into 1-inch pieces. Set aside.
- Cook 1 pound hot Italian sausage in Dutch oven over medium-high heat until browned, 5 to 7 minutes, breaking up meat with wooden spoon.
- Use slotted spoon to transfer sausage to plate, leaving fat behind in pot; set sausage aside.
- Add leeks, fennel, 4 thinly sliced garlic cloves, 1 tablespoon extra-virgin olive oil, ÂĽ teaspoon table salt, 1 bay leaf, and 4 thyme sprigs to pot. Reduce heat to medium and cook, stirring occasionally, until vegetables are tender and just beginning to brown, about 7 minutes.
- Stir in squash; 6 cups chicken broth; 1 (15-ounce) can cannellini beans, rinsed; and sausage, scraping up any browned bits. Cover pot, increase heat to high, and bring soup to vigorous simmer.
- Reduce heat to medium and simmer vigorously until squash is tender, 20 to 25 minutes, adjusting heat as needed.e.
Recipe by Aran Goyoaga for America’s Test Kitchen

All my favourite ingredients tastily combined – I would love this with the sausage but could happily finish a bowl without for the sake of a healthier, weight-reducing meal . . . thanks!
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