In a mixing bowl, combine the mashed potatoes, ginger–chilli paste, cumin seeds, chopped coriander, salt, rajgira flour, and roasted peanut powder.
Mix everything well, then add water gradually and knead into a soft, smooth dough.
Add1 tsp oil and knead once again to make the dough pliable. Cover and rest the dough for 10–15 minutes.
Divide into small portions and shape into balls.
Gently roll each ball into a paratha (you can roll between plastic sheets or parchment paper if needed, as rajgira flour is gluten-free).
Heat an iron griddle (tawa) on medium heat.
Place the paratha on the hot griddle, drizzle a little oil or ghee,and cook until golden spots appear on both sides.
Serve hot with curd (yogurt) and coriander chutney.