Place bulgur in a bowl and cover with the boiling water. Let sit for 15 minutes.
Most of the water will have been absorbed by the bulgur. Drain excess water.
Add cucumbers, parsley and mint to the bulgur. Toss to combine.
Pour lemon juice into a small bowl.
While whisking, slowly drizzle in olive oil until thoroughly incorporated.
Add to bulgur and mix well. Leave to rest for 30 minutes.
Add tomatoes and toss to combine. Adjust salt and pepper, as necessary.
Serve chilled or at room temperature.
Notes
Onions are also usually included, but I don't like raw onions, so I've personalized the salad to my preferences. When I make this for other people, I add 1 chopped red onion. Other optional additions include olives and bell peppers.