Bigoli in salsa is one of the most classic Venetian dishes which is found mostly in the city of Venice itself, but in variations in other parts of the Veneto. It consists of a kind of pasta made with semolina flour and eggs, served in an anchovy and onion sauce. The bigoli themselves are like very thick spaghetti, and similar to Tuscan pici or bringoli except that those are made without eggs. The name is also used for a kind of wholewheat spaghetti typical to the town of Bassano del Grappa in the north of the Veneto and so these are also sometimes used. Normal spaghetti would work well if it’s all that you can find.