"This vegetable-packed zuppa is a perfect way to use day-old bread...."
INGREDIENTS
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1/2 1-pound loaf sourdough bread, torn into 2" pieces (about 6 cups)
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1 bunch collard greens, center ribs and stems removed
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1 bunch Tuscan or other kale, center ribs and stems removed
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Kosher salt
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1/2 cup olive oil, divided, plus more for serving
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2 medium carrots, peeled, finely chopped
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2 celery stalks, finely chopped
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1 leek, white and pale-green parts only, chopped
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4 garlic cloves, chopped
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1/2 teaspoons crushed red pepper flakes
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1 28-ounce can whole peeled tomatoes, drained
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8 cups low-sodium vegetable broth
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3 15-ounce cans cannellini (white kidney) beans, rinsed
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4 sprigs thyme
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1 sprig marjoram or oregano
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1 bay leaf
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Freshly ground black pepper
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Shaved Parmesan (for serving)