In a medium bowl combine cucumber, vinegar, sugar, and pepper to taste; set aside. In a small bowl combine mayonnaise and chili sauce; set aside.
Season fillets with pepper to taste. Coat fillets with flour, turning to coat; shake off excess. In a large nonstick skillet heat oil over medium-high heat. Cook fillets 4 to 6 minutes per side or until fish flakes easily with a fork.
For each sandwich, spread mayonnaise mixture onto toasted bread slice. Top with lettuce, and add fillet. Top with marinated cucumber ribbons, and serve.
Serving Size 1
Servings 0
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.