From the leftover roti dough, take a medium-sized dough ball, coat it with dry flour, and roll it into a big, thin roti.
Heat a tawa and roast the roti on a medium flame. Make six rotis from the leftover dough and keep them aside.
Now, in a pan, add 2 tbsp oil, ½ tsp cumin seeds, and 1 tbsp green chili-ginger-garlic paste. Sauté for a few seconds.
Add ½ cup chopped onion and sauté until it becomes transparent.
Then add ½ cup finely chopped cabbage, ¼ cup finely chopped carrot, ¼ cup finely chopped capsicum, ¼ cup boiled and mashed green peas, and salt. Sauté on high flame until the vegetables become slightly soft.
Next, add 1 tsp red chili powder, 1 tsp coriander powder, 1 tsp cumin powder, ½ tsp garam masala, and 1 tsp chaat masala. Mix well.
Turn off the heat and transfer the mixture to a mixing bowl. Add 1 cup (or 2 medium-sized) boiled and mashed potatoes, salt, 1 tsp lemon juice, and some chopped coriander leaves. Mix well.
The masala is ready. Keep it aside.
Take one roti and make a cut on one side. Spread tomato ketchup over it.
Add 2 tbsp of the prepared masala and spread it evenly in a thin layer.
Start folding each quarter to form a triangle (refer to the video).
Heat a tawa and spread butter on it. Place the roti wrap on the tawa and roast for 1 minute. Then, place a dish on top of the roti wrap and cook on a low flame until the roti becomes crispy on both sides.
Roast all the bhareli rotlis in the same way.
Finally, cut the bhareli rotli in half or enjoy it as is.