And, the winner is ... Marguerite Ednie received a copy of The Blue Zones: Lessons for Living Longer From the People Who've Lived the Longest for her sweet potato recipe-- so simple yet so satisfying: EASY SWEET POTATOES Scrub/wash sweet potatoes. Prick with a fork. Bake at 350/375 degrees, 45-60 minutes 'til tender. Split in half. Mash insides with fork; drizzle with tahini, fresh lemon juice and cracked black pepper. Did you know? Sweet Potatoes are high in fiber, vitami