Southern Cucumber & Tomato Salad

Ingredients

1/4 cup red wine vinegar

2 tablespoons olive oil
1 tablespoon granulated sugar
1/2 teaspoon kosher salt
1/4 teaspoon freshly ground black pepper
1 hothouse cucumber (or large English, about 12 ounces, thinly sliced crosswise)
1/4 sweet onion (medium, such as Vidalia, thinly sliced)
2 small tomatoes (cut into bite-sized wedges)
1 1/2 teaspoons fresh mint leaves (chopped, optional)

full recipes:https://www.yummly.com/recipe/Southern-Cucumber-_-Tomato-Salad-2431706