From the Super Mario Wiki
Pasta Land is named for the fact that it is the only place where cooked pasta, such as spaghetti, pre-twirled on huge forks, somehow manages to grow out of the ground. Additionally, many areas of the ground resemble a red and whited checkered tablecloth, giving Pasta Land the atmosphere of an Italian restaurant.
In the center of Pasta Land is a village inhabited by Mushroom Folk, who make a living harvesting their local crops. As spaghetti is abundant in the area, it is most likely a staple in the diet of every villager. The mayor of Pasta Land is Mayor Fettuccine.
Pasta Land is apparently technologically behind, as Koopa states that "radios haven't been invented yet" there.