If you gut the fish at home, make sure you clean it well after finishing this process. If necessary, leave it into a large bowl with cold water. After that, take the fish out of the water and place it onto a plate with paper towels, and wipe it with paper towels, to remove excess water;

Mix the flour and the cornmeal together into a large bowl, add some salt and pepper and roll over the fish through this mixture. Make sure the entire body is covered in mixture and add it also inside the fish;

Fry the fish into a preheated pan filled with vegetable oil;

Roll over the fish once you have a brownie crust, to make sure you get the same result on both sides;

Meanwhile, prepare the garlic sauce. Using a garlic press, crush the garlic, add ½ teaspoons salt and the mustard. Using a spoon, mix the ingredients well and start pouring small quantities of vegetable oil while mixing. Continue to do this until you have a creamy consistency. In the end, add 3 tablespoons of sour cream, mix well and add salt and pepper if you feel the need.

Serve the pan fried fish with garlic sauce and lemon juice.