My mother always made this salad, so I tried it on my future husband when we were courting. I discovered later that he didn't like vinegar in his foods, but he learned to enjoy this salad and called it piccalilli.
Cucumber Tomato and Green Onion Salad Recipe photo by Taste of Home
In a bowl, combine the tomatoes, cucumber and onions. In a small bowl, combine the sugar, salt and pepper. Whisk in the vinegar and water. Pour over vegetables and toss to coat. Cover and refrigerate for 4 hours or overnight. Serve with a slotted spoon.