Heat milk in a sauce pan and bring to a boil. Once it starts boiling add vinegar. Let it simmer for sometime. Then strain out water and keep paneer aside.
heat oil in a pan. add cumin seeds. after the crackle, add ginger, garlic, onion and saute for a minute. then add tomatoes and capsicum. mix well and cook for another minute on high flame.
Add all spices mention above ingredients list. Stir well. Add paneer and saute for 2 - 3 minutes stirring in between. add chopped coriander leaves. Mix well.
Remove for heat and keep aside to cool slightly before stuffing them.
Roll one flatbread (slightly thicker like any other paratha). Spread the stuffing evenly leaving margin of 1 inch from all sides so as to close it like an envelope.
Close from all sides as shown in the picture. Press lightly and seal the ends of folds. No need to roll it again.
Press the joints especially but do it lightly.
Heat a tawa and place the paratha on it. Flip it when one side is light brown and apply ghee/ oil on top of it. Do the same to the reverse side. Press corners and sides to check so that they will be cooked evenly.