01 - Arrange the sliced tomatoes and onions evenly on a large serving platter.
02 - In a small mixing bowl, whisk together extra-virgin olive oil, red wine vinegar, lemon juice, salt, and freshly ground black pepper until fully emulsified.
03 - Drizzle the vinaigrette evenly over the arranged tomatoes and onions.
04 - Sprinkle chopped parsley generously over the salad for vibrant flavor and color.
05 - Allow the salad to rest for five minutes before serving to enhance flavor and develop complexity.