With the holidays upon us, you may have butter and gravy on the table. Why not add a bottle of traditional balsamic vinegar? A few drops of balsamic adds a burst of flavor to any dish, and I love it drizzled on vegetables, especially roasted Brussels sprouts, and a drop on pumpkin pie would be fantastic. Balsamic vinegar also makes a great gift for the foodie on your list. When you go to buy that vinegar, how do you know what to buy? Facing supermarket shelves of balsamic vinegar is overwhelming. I mean, where do you start? On a recent visit to Acetaia Leonardi, an authentic, traditional balsamic vinegar producer in Italy, I learned what it takes to make this handcrafted, artisan product. If you want to get a true traditional balsamic vinegar, an Aceto Balsamico Tradizionale di Modena D.O.P., handcrafted by a producer such as Leonardi, there are a few tips to guide…