Make a dough with wheat flour, salt and water. Knead well and allow it to rest for 30 mins.
Now take soaked rajma in a pressure cooker, cover it with water and cook for 6 whistle and simmer the cooker for 15 mins. Turn off the stove and let the steam go all by itself. Open the cooker and drain the rajma. Mash it well.
Now heat oil in a kadai. Add in onions, chillies and ginger garlic paste. Saute it for a min.
Add in cooked mashed rajma and mix well. Add in garam masala powder, salt and amchoor powder. Mix well.
Add in coriander leaves and mix well. Once it comes together remove it to a bowl and let it cool down
Now divide the dough and this rajma mix into equal portions. Tae one dough and flatten it slightly, place rajma ball inside this and cover all the sides. Roll it carefully and cook on hot tawa till the paratha is cooked on both sides, drizzle oil while cooking paratha.