Combine first 5 ingredients in a shallow dish. Whisk eggs with milk in a shallow bowl. Place panko in a separate shallow dish. Dredge both sides of halibut fillets in seasoned flour, and then dip in egg mixture. Dredge in panko. Heat butter and oil in a large heavy skillet. Fry fish in hot oil mixture, in batches, 2 minutes on each side or until golden. Drain fish on paper towels; let cool slightly, and cut fillets into 14 pieces.
Spread Red Pepper Mayonnaise on 14 Cornbread Rounds; top each round with 1 piece of fish, 2 pieces of lettuce, and 1 Cornbread Round. Serve immediately.