Easy Tomato Salad

Bahan-bahan (4 porsi)

• ½ cup chopped red onion (about ½ small red onion)
• 1 pint (12 ounces or 2 cups) cherry tomatoes, halved
• 1 pound additional tomatoes (about 1 large, 2 medium or 3 small), cut into bite-sized wedges
• ¼ cup thinly sliced fresh basil and/or small basil leaves (or substitute parsley, dill and/or chives)
• 2 tablespoons extra-virgin olive oil
• 2 tablespoons thick balsamic vinegar* or balsamic glaze
• ½ teaspoon flaky sea salt or kosher salt, to taste
• Freshly ground black pepper, to taste
• ½ English cucumber or 1 Persian cucumber, thinly sliced
• 1 torn mozzarella ball or around 1 cup mini mozzarella balls or cubed part-skim mozzarella
• 1 ripe avocado, sliced or diced
• Handful of baby arugula