How to Make It
Sprinkle fish with 1/4 teaspoon pepper and salt. Sprinkle with cornmeal. Heat a large nonstick skillet over medium-high heat. Add oil; swirl to coat. Add fish to pan; cook 4 minutes on each side or until done. Set aside; keep warm.
Combine cider vinegar, mayonnaise, mustard, sugar, and remaining 1/4 teaspoon black pepper in a medium bowl, stirring with a whisk. Add green cabbage, red cabbage, sliced apple, and red onion; toss to coat. Place 1 fillet on bottom half of each Kaiser roll. Top each serving with about 1/2 cup slaw and top half of roll.