After indulging in a holiday season of rich food and festive drinks, January’s focus on diets, detox, and resolutions can seem as bleak as the weather. Instead of going cold turkey, our solution to easing into a healthier lifestyle is a collection of winter soups that are light on the butter and cream and perfect for an evening at home. And for those who continue to celebrate into the new year, soups are a dinner host’s best friend: All the work is done in advance and it takes only seconds to plate before serving.