отваренное

In a sentence

• Я ем отваренное мясо каждый день.

  I eat boiled meat every day.

  In this sentence, 'отваренное' is an adjective derived from the verb 'отварить', indicating that the meat has been boiled.

• Отваренные овощи полезны для здоровья.

  Boiled vegetables are healthy.

  Here, 'отваренные' is plural to match 'овощи' and describes the state of the vegetables as having been boiled.

• Советую вам попробовать отваренное яйцо на завтрак.

  I recommend you try a boiled egg for breakfast.

  In this instance, 'отваренное' is singular, agreeing with 'яйцо', describing the egg as prepared by boiling.