Tamago nigiri is a type of sushi that features a sweet, layered omelet known as tamago placed atop a small mound of vinegared rice. The omelet is typically made from eggs, sugar, and soy sauce, giving it a delicate flavor and a slightly fluffy texture. This dish is often served as a part of a sushi platter and is popular in Japanese cuisine. It is appreciated for its simplicity and balance, making it a favorite among sushi lovers, especially those who enjoy milder flavors.