Chicken Fillet Burger, composed of two gourmet brioche buns, layered with a spicy or normal chicken fillet, freshly shredded lettuce. Burgers with a spicy fillet will be topped with Morley's spicy mayonnaise, whereas burgers with a normal fillet are completed with regular Morley's mayonnaise., Our spicy fillets may seem pink in colour when eaten. This is perfectly normal and arises due to the unique spices we use to marinade them!