Place a slice of Mozzarella on a serving plate and drizzle with a small amount of the vinegar and oil, then a small sprinkling of salt and pepper. Layer with a slice of tomato, then a basil leaf, then two more tomato slices. Top with one more slice of Mozzarella and then another fresh basil leaf. Drizzle with more vinegar and oil, to taste. Season with a little more salt and pepper.
Note: I found it easiest to provide you with directions for one, but you can make as many stacks as you like by using more of the ingredients and repeating with separate stacks.