Prepare the Bulgur Wheat: In a large bowl, add the bulgur wheat and pour the boiling water over it. Cover the bowl with a lid or plate and let it sit for 15–20 minutes, or until the bulgur has absorbed all the water and is tender. Fluff it with a fork to separate the grains and let it cool slightly.
Prepare the Vegetables and Herbs: While the bulgur cools, finely chop the parsley and mint leaves. Dice the cucumber, halve the cherry tomatoes, and finely chop the onion or scallions.
Make the Lemon Dressing: In a small bowl, whisk together the olive oil, lemon juice, lemon zest, minced garlic, cumin, salt, and pepper until emulsified.
Assemble the Salad: In a large mixing bowl, combine the cooled bulgur with the chopped herbs, cucumber, tomatoes, and onion. Pour the lemon dressing over the mixture and toss gently until everything is evenly coated.
Adjust and Chill: Taste and adjust seasoning with more lemon juice, salt, or pepper as needed. For best flavor, refrigerate for at least 30 minutes before serving to let the flavors meld.