Preheat a deep-fryer to 375 degrees F or In a large, sauce pan pour vegetable oil - half way up.
In a large bowl mix together, cornmeal,garlic , onion powder, cayenne, salt and pepper.
If fish fillet too large cut into bite-sized pieces.
Dip each strip in buttermilk and lightly deep into the remaining corn meal.
Deep fry the fish in the fryer or saucepan a few pieces at a time, moving them around so they don't stick.
Fry until brown and crispy, about 3 to 4 minutes or more depending on the size.
These big chunks took about 6 minutes per side.
Remove from the fryer with a slotted spoon place on a cookie rack to ensure crispness..
Repeat with the remaining fillets and season the fish with lemon juice.
Serve with tartar sauce