Step 1: Prepare the Chickpeas : Drain and rinse chickpeas thoroughly under cold water. If you prefer them crispy, pat them dry and lightly roast in a skillet with a drizzle of olive oil and a pinch of cumin for 3–5 minutes. Let cool slightly before mixing.
Step 2: Chop the Vegetables : Dice cucumbers, tomatoes, and bell peppers into small pieces. Finely chop red onion, parsley, and mint. Combine all the vegetables and herbs in a large salad bowl.
Step 3: Make the Tahini Dressing : In a small bowl, whisk together tahini, lemon juice, olive oil, minced garlic, cumin, and salt. Gradually whisk in warm water, 1 tablespoon at a time, until the dressing is smooth and pourable. Taste and adjust lemon or salt as desired.
Step 4: Combine and Toss : Add the chickpeas to the salad bowl with the chopped vegetables. Pour the tahini dressing over the top. Toss everything gently until evenly coated.
Step 5: Season and Serve : Adjust seasoning with extra salt, pepper, or lemon juice to taste. Sprinkle with a pinch of sumac or a drizzle of olive oil before serving.