I'm 22 years old and just met the girl of my dreams. The one caveat is we are from different ethnicities. How should I break it to my parents?

I've always thought I'd date someone of the same religion and culture as me, but life has other plans. I'm Christian and she's Jewish. We have been dating for a few months now, and I can tell she's the one. But I'm afraid of breaking the news to my parents. They'll be worried about our differences, especially when it comes to religion, and I don't know how to approach the conversation. Can anyone provide advice on how to break the news gently?