There is a potato salad made by Uncle Scar at the midnight food store. It's delicious. Clean cucumbers and tomatoes and peel onions. Brush the potato skin clean, cut it in half, then cut it in half into 4 large pieces, lay it flat in a microwave oven container and wrap it with plastic wrap. Slice the cucumber as thin as possible, wash the tomato, scald it with boiling water, peel it, and cut the seedless part into small pieces. Take out the potatoes cooked in the microwave oven, cool them a little, peel them off, put them in a fresh-keeping bag and roll them into mashed potatoes with a rolling pin. Put the mashed potatoes into a large bowl, add the salad dressing several times, stir well every time and then add the next time. After adding the salad dressing, add the milk and stir well to make the mashed potatoes completely absorb the milk. Then add cucumber slices, diced tomatoes and diced onions, mix well and serve.