Slice the hard boiled eggs and set aside. Pierce them with fork randomly, 4 times each egg covering all the sides. This Prevents the egg from bursting. Slice each egg to 3.
Blend together onion, chilli and ginger garlic with 2 tbspn water to make a fine paste.
Mix together besan, salt, turmeric, rice flour, chilli powder and ajwain.
Add onion paste to this and make a batter using more water as needed.
Heat oil to deep fry, when the oil is hot enough, dip each slice in the batter. Fry in hot oil until golden.
Top with chopped lemon onins and serve