cebulą

In a sentence

• Posypałem zupę cebulą.

  I sprinkled the soup with onion.

  Here, 'cebulą' is used as an instrumental case noun, indicating the means or tool (seasoning) used for an action.

• Obchodzę się z cebulą ostrożnie, aby nie płakać.

  I handle the onion carefully to avoid crying.

  In this sentence, 'cebulą' is in the instrumental case, denoting association or accompaniment while the action (handling) is performed.

• Sałatka jest przygotowana z cebulą.

  The salad is prepared with onion.

  Here, 'cebulą' is used in the instrumental case to express inclusion or accompaniment in the dish described.