In a bowl, mix all-purpose flour with a pinch of salt and a little water to form a soft dough. Cover and rest for 15 minutes.
Divide the dough into small balls and roll them into small flat discs.
Heat oil in a deep pan and fry each disc until it puffs up and turns light golden. Remove and set aside.
For the Aloo Bhaji, heat oil in a pan and add cumin seeds. Let them crackle.
Add sliced onions and sauté until soft and lightly golden.
Add turmeric powder, boiled potatoes, and salt. Mix well.
Cook for 4–5 minutes, lightly mashing some potatoes for texture.
Serve hot Aloo Bhaji with freshly fried Luchi.