Yield: 8-10 servings
2 tablespoons extra-virgin olive oil
2 carrots, halved lengthwise and thinly sliced
1 medium onion, chopped
2 to 3 cloves garlic, chopped
2 tablespoons tomato paste
Kosher salt and freshly ground pepper
1/4 pound green or yellow wax beans
1 small zucchini or yellow summer squash
1 15-ounce can white beans or chickpeas, drained and rinsed
1/2 cup broken spaghetti or other small pasta
3/4 cup pesto
Grated parmesan cheese and crusty bread, for serving (optional)
Heat the olive oil in a large pot over medium-high heat. Add the carrots and onion and cook, stirring constantly, until the onion is lightly browned, about 5 minutes. Add the garlic, tomato paste and 1 tablespoon salt and cook 1 more minute. Add 7 cups water, cover and bring to a boil. Uncover, reduce the heat and simmer 5 minutes. Season with salt and pepper.
Meanwhile, trim the green beans and zucchini and cut into 1/2-inch pieces. Stir into the prepared broth along with the beans and spaghetti. Simmer until the pasta is al dente, about 10 minutes.
When ready to serve, whisk 1/3 cup pesto into the soup. Ladle into bowls and top with the remaining pesto. Sprinkle with parmesan and serve with bread, if desired.
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