Gyudon: a rice bowl topped with thinly sliced beef and onions simmered in a sweet-savory sauce; often served as a quick, affordable meal.
昼ご飯は近くの店で牛丼を食べた。
I had gyudon at a nearby restaurant for lunch.
このチェーンの牛丼は安くて早いので学生に人気だ。
This chain's gyudon is cheap and quick, so it's popular with students.
牛丼には紅生姜や七味をかけて食べるのが好きだ。
I like to eat gyudon with pickled ginger and shichimi (seven-spice).