White pasta is only accepted since we haven't yet been exposed to its meaning of paste: it is meant to be white paste
Yes, it can as in "almond paste" (pasta di mandorle) or 'anchovy paste' (pasta di acciughe).
"A white pasta"? Isn't pasta uncountable, how can you have "one pasta"?
"Pasta" as a dish of "pasta" is uncountable, but if you consider the single "pasta" in "pasta", then "pasta" is countable. Easy, right ? ;-)
Besides, "pasta" means also "pastry".
I'm thinking that if you were ordering in a restaurant maybe you would order 1 white pasta, meaning a pasta with white sauce, does that make sense?
pasta in bianco is, by definition, pasta without sauce. Only salt and butter are allowed. And parmesan cheese. But no sauce :-)
In this context it would probably mean pastry, yeah. Usually when you ask for "one" ("una") pasta you're referring to the pastry. While "la pasta" refers to a pasta dish.
Why are there so many deleted comments? Things heating up in the pasta fandom