Chef John's Penne with Vodka Sauce

Ingredients (10)

• + 4 ounces pancetta bacon, diced add to pantry
• + 1 small sprig fresh rosemary add to pantry
• + 1 tablespoon olive oil add to pantry
• ✓ ½ cup vodka
• + ½ cup heavy whipping cream add to pantry
• + freshly ground black pepper to taste add to pantry
• + 3 cups prepared marinara sauce add to pantry
• + ¾ cup water add to pantry
• + 1 (14.5 ounce) package multigrain penne pasta (such as Barilla®) add to pantry
• + ½ cup freshly grated Parmesan cheese add to pantry