うどん is a type of thick wheat noodle that is popular in Japanese cuisine. It is made from simple ingredients: flour, water, and salt. The dough is kneaded and then rolled out before being cut into long, flat strips. Udon can be served in various ways, including hot in a broth or cold with a dipping sauce. This noodle dish is often enjoyed with a variety of toppings, such as green onions, tempura, or tofu. Udon is versatile and can be found in many regional variations across Japan, each with its own unique flavors and ingredients.