1/3 cup (high quality) red wine vinegar
1 tablespoon white sugar
1 teaspoon salt
2 large cucumbers, peeled, seeded, and cut into 1/2-inch slices
3 large tomatoes, seeded and chopped
2/3 cup chopped red onion
1/2 cup chopped fresh mint
2 tablespoons olive oil
salt and pepper to taste
In a large bowl, combine vinegar, sugar, and salt. Mix in cucumbers, and marinate 1 hour, stirring occasionally.
Gently toss tomatoes, onion, mint, and olive oil with the marinated cucumbers. Season with salt and pepper.