Questions & Answers about Die boerewors is lekker.
Here, boerewors is being used as a singular mass noun, like sausage or bread in English when you mean it in a general sense.
So Die boerewors is lekker means the sausage / the boerewors is tasty, not are tasty.
Even though the word may look unfamiliar, the verb is shows that the noun is being treated as singular here.