"Sure, at my last job we had a problem where the situation was "X" ... the action I took was "Y" ... and the positive outcome was "Z" ... In an email to the entire team I was praised by Susan, the Project Manager, for solving the problem and cutting costs about 15% for that project. We were also able to deliver in about ⅔ the time it would have taken us otherwise. What I learned from the situation was "ABC." I think that's the type of experience you are looking to bring to your team, isn't it?"