Clean the fish and drain the water. Grind together ginger, green chilli, pepper and garlic, along with lemon juice & salt. Marinate the cleaned fish peices with the ground paste and keep it for 1 hour. Strain together plain flour, salt & pepper powder. Sprinkle the flour mixture over the fish pieces. Dip the fish pieces coated with flour in egg and roll it in bread crumbs. Heat oil in a pan and deep fry the fish pieces till it becomes golden brown or till the fish is cooked. Serve hot with sweet chili sauce.