To make a tomato and scallion salad with raspberry vinegar salad recipe, first you will need to prepare your ingredients. First, you'll need: Tomatoes: Cut the tomatoes in half and remove the seeds. Then, slice the tomato lengthwise and cut it into 1/4-inch slices. Add the sliced tomatoes to the bowl of ice water and stir to combine. Let the mixture sit for ten minutes. Strain the liquid from the salad and add it to your serving bowl. Toss the ingredients together and serve.