flat dish; flat plate
A shallow, flat plate or dish, as opposed to a deep bowl. Common in everyday tableware.
Arrange the food on a flat plate.
この平皿は電子レンジで使えますか？
Can this flat dish be used in the microwave?
Compound of 平 (ひら, 'flat') and 皿 (さら, 'plate'). The reading さら becomes ざら due to rendaku.