INGREDIENTS
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2 tablespoons olive oil
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2 pounds plum or Roma tomatoes (about 8), coarsely chopped
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1/2 teaspoon kosher salt
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1/4 teaspoon freshly ground black pepper
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Pinch red pepper flakes (optional)
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3 cloves garlic, minced
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2 (8-ounce) packages fresh cheese tortellini, or 1 (19-ounce) bag frozen cheese tortellini
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2 cups packed baby spinach
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Freshly grated Parmesan cheese, for serving