INGREDIENTS
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3 tablespoons olive oil
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1 onion, finely diced
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1 large carrot, peeled and diced into 1/4-inch pieces
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1 rib celery, trimmed and diced into 1/4-inch pieces
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Kosher salt and freshly ground black pepper
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8 ounces lean (8 percent fat) ground beef
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3 garlic cloves, minced
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1 tablespoon tomato paste
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4 cups low-sodium beef broth
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1 (28-ounce) can diced tomatoes
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1 (15-ounce) can cannellini beans, rinsed and drained
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1 dried bay leaf
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1/2 cup grated Parmesan