The Crispy Fish Sandwich is a dish featuring a crispy battered fish fillet served on a bun with tartar sauce. The fish is coated in a dry batter mix and dipped into a wet batter before being deep-fried until golden and crispy. The tartar sauce is made with mayonnaise, pickles, capers, lemon juice, and optional caviar. The sandwich is assembled with the fish fillet, tartar sauce, and desired toppings.