I think this is F#, not Haskell. '*' creates a product type, pretty sure it's a tuple in this case. "Meat option" is an alternative syntax for "Option<Meat>" an

I think this is F#, not Haskell. '*' creates a product type, pretty sure it's a tuple in this case. "Meat option" is an alternative syntax for "Option<Meat>" and "Ingredient list" is a linked list of Ingredients