No matter how you phrase this reply, your answer must be authentic and genuine. Rehearse this many times, so you have your basic talking points down. Don’t be afraid to toot your own metaphorical horn here - it may seem terrifying, but kicking off your interview this way can be a great “teaser” for other questions that may come later in the interview. Let yourself be genuinely proud about your accomplishments, and you’re off to a great start.