Penne with Creamy Pumpkin Sauce

Ingredients

• 12 ounces penne rigate (ridged), or other short pasta
• Coarse salt
• 2 tablespoons olive oil
• 1 tablespoon fresh rosemary
• 1 can (15 ounces) pure pumpkin puree
• 1 garlic clove, minced
• ½ cup half-and-half
• + 3 more ingredients
• • ¹/₃ cup grated Parmesan
  • 1 tablespoon white-wine vinegar
  • ¼ teaspoon red-pepper flakes, plus more for garnish (optional)

1. Cook pasta in a large pot of boiling salted water until al dente. Reserve 2 cups pasta water; drain pasta and set aside. 2. In pasta pot, heat oil over medium. Add rosemary and fry, stirring, until starting to brown, 1 to 2 minutes. Using a slotted spoon, transfer rosemary to a paper towel, l...

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