Best: Green Beans
Green beans are one of the healthiest foods you can eat during the holidays (or any time of year). They're a good source of vitamins A, C, and K, manganese, dietary fiber, potassium, folate, and iron. They key is how you prepare them. Drowning them in butter or calorie-laden cream sauce is the best way to negate those benefits with excess fat and calories. Best bet? Boil or steam them, and use healthful seasonings (and even butter, in moderation).