Take 10 pieces of Bhetki fish fillets on a plate. Squeeze half a lemon and add regular table salt according to taste. Mix and keep aside for 20 minutes.
Take 1 piece of medium-size roughly cut onion, 1 piece of 2-inch size ginger (cut in small pieces), 10 cloves of deskinned garlic, 5 pieces of fresh green chilies, ½ cup of fresh mint (pudina) leaves, and ½ cup of fresh coriander leaves in a mixer grinder. Make a paste.
Mix the paste with the marinated fish fillets.
Transfer to an airtight container. Refrigerate for 40 to 45 minutes. Do not put it in the freezer.
After 40 minutes, take two eggs and whip them.
Mix 3 tbsp of the egg mixture with the marinated fish pieces.
Add 2 tbsp of refined wheat flour (maida) to it. Mix well.
Now take a sufficient amount of bread crumbs in a tray. Add ½ tsp of salt and ½ tsp of black pepper powder to it. Mix.
Also add ¼ tsp of salt and ¼ tsp of black pepper powder to the egg mixture. Mix.
Put 1 fillet in bread crumbs. Coat nicely.
Then put it in egg mixture. Coat nicely. (Pro tip: You may repeat steps 10 and 11 for double-coating the fish fillets).
Put it on your countertop. Give it the right rectangular shape using a scraper.
Repeat steps 10 to 12 for all pieces. Keep them on a plate aside for 5 minutes to set.
Now, heat a sufficient amount of refined oil in a kadai. Put each piece one by one very carefully.
Flip after a minute.
Fry for 3 to 4 minutes on a medium flame. Take them out when golden brown. Fry all the pieces in the same way.
Your tasty and spicy homemade fish fries are ready. Sprinkle a bit of black salt on top and serve them hot with salad and mustard sauce.