In a large bowl, whisk together the vinegar, garlic, brown sugar, olive oil and salt until fully incorporated.Add the peaches, tomatoes and the basil, toss with the dressing.Mix in mozzarella pieces.Sprinkle with flakey salt & freshly ground pepper to taste.Note: Alternatively you can slice the peaches, tomatoes and mozzarella and arrange beautifully on a platter, tuck in the basil leaves then drizzle with dressing