Plate
Dish
noun
The kanji and the word are exactly the same. That means they share meanings as well.
さら
Since this word is made up of a single kanji, it should use the kun'yomi reading which is also the reading you learned when you learned the kanji.
お皿をあらってから、ベッドにいきました。
I did the dishes and then went to bed.
あとは、この竹の子を皿にもりつければかんせいです。\(*皿* )
Arrange these bamboo shoots on a plate and it's done! \(*皿* )
うちのいいお皿を射撃の標的に使うのはやめてくれ！
Stop using our good plates for target practice!