Sura meen cutlet

I am presenting this  recipe which is my mother in law's with minor modifications.
Ingredients
Sura meen ( shark fish)-250 gas
Potatoes- 250 gms
Onion- 3 to 4 medium sized
Green chillies- 4 to 5
Finely chopped Coriander leaves
Soya sauce- 1 tsp
Ginger- a small piece finely chopped
Garlic- 7 to 8 pods finely chopped
Turmeric powder- 1/4 tsp
Chillie powder- 1 tsp
Pepper powder- 1/2 tsp
Salt to taste
Egg-1
Bread crumbs or rusk powder
Oil - for shallow frying

Procedure
Steam the shark / Sura meen in idli vessel or in case of pressure cooker, cook for 5 minutes with out putting the weight. There will be excess water left over with the flesh after steaming.  Remove the excess water and take only the flesh . Allow it to cool. Once cool,mash it with hands or spoon into smaller pieces.
Boil the potatoes , peel the skin and mash it. Mix both the steamed Sura meen and potatoes together.

Finely chop the onions, chillies, Coriander leaves, ginger and garlic.

Pour 2tsp oil in a Kadai and put the onions. Saute till golden brown. Then add the green chillies, ginger, garlic, Coriander leaves and cook in slow flame for 3 to 4 minutes.  Add the chilli powder, turmeric powder and cook for 3 to 4 minutes.  Add the Sura meen and potato mixture,

 Soya sauce and salt. Mix everything thoroughly and cook for another 3 to 5 minutes.  Allow it to cool. 

Roll into small balls and then flatten it into circle shape. Dip in egg beaten with salt and pepper. Then roll it in rusk powder. 

Shallow fry in oil with frequent tossing.  

Serve it hot with sauce.