I don't think there is one. But i think you can use any.
silly salami
The Grandwich
The No-Sand-wich
your mah
Argfh
Although the noun 'lot' is not a standard collective noun for a specific group of people or things, the noun 'lot' is used a lot as an informal collective noun; for example, a lot of questions, a lot of trouble, a lot of fun, etc.
Examples of collective nouns are 'a lot of parking attendants' and 'a lot of realtors'.
Bread/Sandwiches Rice Soup Pasta Cereal Hot Dogs
The collective nouns for sharks is a school of sharks, a shoal of sharks, and a shiver of sharks. I like shiver a lot. If there is a specific collective noun for the great white shark, I do not know what it is.
Subway sandwiches can be great because you can choose exactly which ingredients you do and do not want on your sandwich, and there are a lot of choices.
The collective name for a group of sailors are called a crew
The collective name for fats, proteins, and carbohydrates is obesity.
The standard collective nouns are a cache of money, a rouleau of money, a wad of money.
BLT's
The collective name is a bed of clams.
The collective name for badger is 'sett'
Coleslaw! It tastes good with a lot of sandwiches.