Preheat oven to 400°F
Heat oil in a pan and add onions and garlic. Once onions become translucent, add green chillies.
Add ginger garlic paste, add turmeric powder and then add potatoes, carrots, cabbage and mushrooms.
Add salt, garam masala, cumin powder, chaat masala and saute for sometime.
Halve the parathas. Brush oil on the sides of the sheets. Place the vegetable stuffing on one side, seal the puff to make a triangle.
Place the puffs on baking sheet. Bake for 25 minutes on top rack. Remove when it becomes brown and allow it to cool for 5 minutes. Serve with tomato sauce.