The main ingredient in traditional pad Thai is rice noodles. These thin, flat noodles are usually stir-fried with a combination of ingredients such as eggs, tofu or shrimp, and a variety of vegetables. It's typically flavored with tamarind paste, fish sauce, and sometimes sugar, creating a sweet and savory dish. Other common toppings include crushed peanuts, lime, and bean sprouts. Pad Thai is a popular street food in Thailand and has gained worldwide recognition for its unique taste and satisfying texture. It showcases the balance of flavors and ingredients that are central to Thai cuisine.