With all the news about the health and environmental advantages of eating less meat, many people are trying to eat more plant-based meals. But where do you begin? Instead of trying to cook an entire vegetarian meal from scratch, start with one small step and build from there, says Dr. Rani Polak, founding director of the Culinary Healthcare Education Fundamentals (CHEF) coaching program at Harvard’s Institute of Lifestyle Medicine. “For example, buy some canned beans. You can then make a…