Chow mein is a Chinese dish made of stir-fried noodles with vegetables. You can almost always find chow mein on the menu at a Chinese restaurant.
Chow mein is from the Cantonese chaomian, which translates to "fried noodles." The dish is especially popular throughout the Chinese diaspora. On the east coast of the U.S., chow mein is made with crispy, fried noodles, while west coast versions use a softer, steamed noodle. It often includes meat or tofu, and it's almost always made with onions and celery.