INGREDIENTS
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12 ounces linguine
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12 ounces cherry or grape tomatoes, halved or quartered if large
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1 onion, thinly sliced (about 2 cups)
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6 cloves garlic, thinly sliced
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1/2- 3/4 teaspoon red-pepper flakes
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2 sprigs basil, plus torn leaves for garnish
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2-3 tablespoons extra-virgin olive oil, plus more for serving
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kosher salt and freshly ground pepper
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4 1/2 cups water
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Lots of freshly grated Parmesan cheese, for serving