Mix the salad. In a large bowl, mix the chickpeas, bell pepper, jalapeno (if using), tomatoes, green onion, sun-dried tomatoes, olives, and herbs.
Make the dressing. In a separate bowl or jar, add the oil, vinegar, lemon juice, garlic, sumac, Aleppo pepper, and red pepper (if using). Season with salt and pepper to taste and whisk to combine.
Dress. Drizzle the dressing over the salad and mix gently to coat. Ideally, leave aside for 30 minutes before serving, or cover and refrigerate until you’re ready to serve.
Serve. When ready to serve, give the salad a quick mix and taste to adjust seasoning if at all needed. Enjoy!