I'm guessing it's a correct answer for UK and foreign English speakers. In British English, collective nouns are treated as plural. For example, in an English sports report, you might hear "The team are returning from the tournament in Germany."
"Pork roast" is also an accepted answer. Generally, meals are hard to translate between languages, since one country might not have a meal that another has. So in those cases, the Danish course is opting for just using the Danish terms.