Finely dice the tomatoes, cucumbers, and onion. Place them in a large mixing bowl.
Add the chopped parsley and mint.

Drizzle the olive oil, salt and lemon juice over the vegetables.

Toss everything together until well combined. Taste and adjust seasoning, adding more lemon juice or salt as needed.

Transfer to a serving bowl and enjoy as a side dish with grilled meats, rice dishes, or as part of a mezze spread.