Whether it's tilapia, sole, or flounder, here are the key steps to properly prepare and cook flaky fish fillets. Step 1: Season and Rest. Sprinkle fillets with salt and let rest. ... Step 2: Cut Thin Fillets Lengthwise. ... Step 3: Cook on First Side. ... Step 4: Flip. ... Step 5: Cook Second Side. ... Recipes That Use This Technique. Oct 14, 2023