It all comes down to one word. And that word is not “kale”. The year is already two weeks old, and we’re still trying to nail down exactly what we meant when we half-heartedly (and full-drunkenly) decided that 2016 would be the year we “eat better,” or whatever.To help hold ourselves accountable with some concrete advice, we turned to Seamus Mullen, a chef, author, and health-food advocate who told us in no uncertain terms that…