Make lime dressing: In a jar with a tight-fitting lid, combine all dressing ingredients; shake well. Refrigerate at least 1 hour. To make salad: Peel avocados; remove pits; cut into cubes. In medium bowl, combine avocado cubes and pineapple chunks. Pour dressing over all. Refrigerate 1 hour. To serve: Arrange avocado and pineapple on 6-8 individual serving plates. Circle each serving with tomato wedges. Cook time is refrigerating time.