New England Grilled Cod Sandwich - Love of Food

Ingredients

• 3 Tablespoons mayonnaise or low-fat mayonnaise
• 1/8 teaspoon prepared horseradish
• 1 1/8 teaspoons ketchup
• ½ teaspoon Dijon mustard
• 1 teaspoon diced red onions
• ½ teaspoon drained and chopped capers
• ¼ teaspoon chopped fresh parsley
• ¼ teaspoon chopped fresh tarragon
• 1 dash Worcestershire Sauce
• 1 dash Tabasco sauce
• 3 ½ cups shredded green cabbage
• 1 ¼ cups shredded red cabbage
• ¼ cup peeled and shredded carrots
• 1 ½ teaspoons granulated sugar
• 1 ½ teaspoons Kosher salt
• ¾ teaspoon celery seed
• ¼ cup and 2 Tablespoons malt vinegar
• 1-pound raw cod loin, cut into 4 equal-size pieces
• 1 Tablespoon and 1 teaspoon Cajun seasoning
• 1 teaspoon Kosher salt
• 1 teaspoon ground black pepper
• ¼ cup lemon juice
• 1 Tablespoon and 1 teaspoon finely chopped fresh Italian parsley
• ¼ cup butter
• 4 (4-inch) multi-grain hamburger buns
• 4 leaves of green lettuce
• 8 slices of tomato
• 4 slices of red onion