Ingredients

FOR THE SOUP 

1 1/2 teaspoons olive oil 

2 cloves garlic, quartered lengthwise 

4 cipollini onions, quartered 

5 ounces red Swiss chard, stems reserved and cut into 1/2-inch lengths, leaves torn into pieces (1/2 bunch) 

1 small butternut squash, (12 ounces), peeled, seeded, and cut into 1/2-inch dice 

1 carrot, peeled and cut diagonal into 1/4-inch-thick slices 

1 zucchini, cut into 1/4-inch-thick slices 

1 cup canned cannellini beans, drained and rinsed 

1 cup fresh or frozen lima beans, (optional) 

1 teaspoon salt 

1/4 teaspoon freshly ground black pepper 

FOR THE PISTOU 

2 cups fresh sorrel or basil, leaves, tough stems removed 

1/2 cup walnuts 

3 cloves garlic 

1/2 cup grated Parmesan cheese 

1/2 cup olive oil 

Dash freshly squeezed lemon juice 

1/4 teaspoon salt 

1/8 teaspoon freshly ground black pepper 

Preparation

Heat a medium stockpot over medium heat, and add olive oil. Add garlic, onions, and chard stems (not leaves); saute until translucent, about 5 minutes. Add squash and carrot; cook 1 minute more. Add 7 cups water, and cook 8 to 10 minutes. Add zucchini and beans; cook until vegetables are tender, about 10 minutes. Stir in chard leaves, salt, and pepper; cook 1 minute more.

Make the pistou: Combine sorrel, walnuts, garlic, and Parmesan in the bowl of a food processor, and pulse until finely chopped. With motor running, drizzle in 1/4 cup, plus 2 tablespoons olive oil, and process until smooth. Add lemon juice, salt, and pepper. Spoon pistou into a small bowl, and top with remaining 2 tablespoons olive oil; refrigerate until ready to use. Stir in olive oil just before serving. To serve, ladle hot soup into bowls; top each with a spoonful of pistou. Serve.