A Cajun lady expert cook taught me this. Here is the Cajun method
1. Catch and fillet a channel cat (or any fish you like) and cut the fillets into small pieces
2. Heat peanut oil to at least 350 deg.
3. In a small bowl, mix a big dollop of mustard into some milk.
4. Add a heaping tablespoon of flour to your seasoning (I prefer "Louisiana" brand) and mix well
5. Assembly line, dip pieces into milk, roll in coating
6. Fry your fish. When they float they are done
You will never need to add lemon juice to your fish again - all you need now is some wild brown rice