Soak chana dal for a hour in water.
Heat 2 tblspn of oil in a pan, and fry the thinly sliced onions till golden. Drain and set aside.
Take mutton in a mixer and crush them few times so it is minced. Set aside.
Heat 1 tblspn oil in a pan, add in cumin seeds and saute for a min.
Add in dry red chillies, ginger garlic and fry for a min.
Now add in minced mutton and mix well.
Add in drained chana dal, salt and cover the pan with a lid. Cook on a low heat till the dal is cooked through.
Press the dal to see if it is cooked, it should mash up instantly.
Now take this mixture in a blender, along with fried onions and coriander leaves.
Pulse few times to make a mix.
Transfer this mixture to a bowl, take small portion from this and shape it into a ball. flatten it.
Crack open a egg in a bowl and beat it lightly,
Dip the patty in egg and shallow fry in some oil till golden on both sides.
Serve hot with some onion rings.