Toss tomatoes, minced garlic, basil, chili, olive oil, vinegar, lemon juice, and salt & pepper together in a bowl.
Allow to marinate in the fridge for at least 1 hour and up to a few hours.
Sprinkle pita squares with sumac and toast in the oven.
After marinating the tomato for at least an hour, add feta cheese, basil leaves, fresh zaatar leaves and the toasted pita to the salad. Toss them with the marinated tomatoes and serve at room temperature.