This heirloom tomato salad is best made with smaller "cherry" size tomatoes, if you can find them. If not, using the larger size will work as well. You can also substitute for non-heirloom tomatoes. This recipe makes a great side dish for fish, chicken, steak or hamburger. You can also chop the ingredients finer to make a topping as well, or mix with chopped lettuce for a flavorful chopped salad.