Heat a large cast-iron skillet, ... see white ash in the skillet bottom, at least ... more. Turn the fish over and again pour 1 ... the heated serving plates.
Pat fillets dry with paper towel. Refrigerate. In saucepan, melt butter; add lemon ... hot skillet. The fish will sear and cook almost ... Turn fillet over; blacken other side. Repeat with remaining ... smoke and high heat.