It’s that time of year when family and friends convene over veggies, tofu and fat-free Jell-O. Oh, wait—make that juicy roasts, creamy sides and delectable desserts. We give you permission to slip—but not fall (only a Grinch would say otherwise)—along with suggestions for calorie-torching holiday fun. If all else fails, remember that a little fat insulates us from the cold. Happy holidays!