So I found this camera in my pocket and it turns out it makes phone calls, too. Technology! I called the local Cheesecake Factory and the guy on the phone said:
Nothing fancy, they're roasted red peppers.
He sounded pretty agitated, it's 7PM here so I'm sure I caught him in the middle of dinner service. But I'm sure he understood that sometimes we must make sacrifices for research.
You can buy them canned or roast them yourself.
PS I've actually had that same dish and I also enjoyed it.