Cook fish on stove top in frying pan, covered on medium heat, until firm.
Remove from heat, set aside to cool.
Mix mayonnaise, mustard, hot sauce, green onions and lemon juice in mixing bowl.
Crumble cooked fish and add to mayo mixture. Add bread crumbs. Mix well. Taste and season as needed.
Add egg. Mix well. Divide into 8 to 10 portions and form cakes/patties.
Heat frying pan (non-stick ideal) on medium heat, use teaspoon of oil if needed and cook fish cakes about 4-5 minutes.
Turn over cakes and cook additional 4-5 minutes or until firm to the touch, and golden brown.
Remove from heat, serve.