Kachumber Salad (Indian Cucumber and Tomato Salad)

In a medium bowl, combine the diced cucumber, tomatoes, red onion, and green chili (if using).

In a small bowl, whisk together the lemon juice, olive oil (if using), cumin powder, salt, and black pepper.

Pour the dressing over the vegetables and gently toss to combine.

Stir in the chopped cilantro.

Refrigerate for at least 10 minutes to allow the flavors to meld.

Serve chilled.