How do I find expired reminders on Apple Mail

I have been using the relatively new "remind me' feature of Apple mail. Once the reminder goes off, the email shows up at the top of my inbox for a while, which is great. However, if I don't respond to that email in a short period of time, it disappears from the top of my inbox. It also is no longer listed under the "Remind Me" tab on the left hand side navigation panel. I can find them by scrolling down in my inbox and looking for the "Remind me" tag on the email. When I click on that email it shows the time and date of the passed remidner.

My question is, how can I easily find these expired "remind me" emails that I didn't respond to when they popped to the top of my inbox? Without being able to find them, it is not a very useful feature.