Final answer:
A cod fillet sandwich typically includes a breaded or battered fried cod fillet, with tartar sauce, lettuce, and sometimes cheese, served between slices of bread or a roll, drawing from the fast food tradition that emerged during the Industrial Revolution.
Step-by-step explanation:
A cod fillet sandwich typically features a breaded or battered cod fillet, which is deep-fried until golden and crispy. This piece of fish is then placed between two slices of bread or in a roll, often accompanied by toppings such as tartar sauce, lettuce, and sometimes cheese or additional condiments. Drawing a parallel from the specified ham sandwich composition, imagine replacing ham with cod (C), adding tartar sauce (TS), and retaining components like cheese (C), and potentially lettuce (L), which might complement the fish. The basic equation for a cod fillet sandwich could then be viewed as cod (C), tartar sauce (TS), cheese (C), lettuce (L), and bread (B).
Reflecting on the history of fish and chips, the cod fillet sandwich can also be seen as a descendent of this iconic dish, enjoying similar popularity in the domain of fast food. The tradition of wrapping greasy, salty delights such as fish and chips in newspaper symbolizes the transformation in food convenience brought on by the Industrial Revolution, a tradition that resonates in the modern grab-and-go accessibility of items like the cod fillet sandwich.