This recipe is from the Williams-Sonoma Collection series, Pasta, by Erica De Mane. A note about capers: Purchase capers packed in salt. They have a sweet, floral fragrance, as opposed to sharp-tasting brine-packed varieties (the vinegar variety changes the flavor of the caper). Ask for them at Italian specialty-food stores. To prepare salted capers, soak them in cool water for about 15 minutes, changing the water once or twice, to remove excess salt. Give them a final rinse and drain well. Estimated prep and cook time combined is 35-40 minutes.