Preheat oven to 200C / 400F. Line a baking tray with baking paper. Set aside.
Arrange fries on the baking tray. Cook them according to package instructions. (I baked them for about 20 minutes).Remove from oven. Sprinkle with chaat masala. Toss to coat. Season with salt.
Top with mozzarella. Bake for 5 minutes or until cheese is melted. Sprinkle with chopped coriander (cilantro) leaves and dried red chili flakes if desired.