Ingredients
1 small red onion, halved lengthwise, thinly sliced crosswise (about 1 cup)
3 tablespoons red-wine vinegar
6 ripe medium tomatoes, cored and cut into wedges
1 English cucumber, partially peeled lengthwise to create stripes, then cut crosswise into 1/2-inch-thick slices, larger pieces halved
2 to 3 tablespoons extra-virgin olive oil
1/4 cup packed fresh basil, larger leaves torn
Sea salt and freshly ground pepper
Preparation
Toss onion with vinegar in a small nonreactive bowl. Cover, and let stand at room temperature for 30 minutes.
Place onion with vinegar, tomatoes, and cucumber on a platter. Drizzle with oil, and top with basil. Season with salt and pepper, and serve.