Dear {{ hiring manager name }},
Thank you so much for taking the time to talk to me about this new position.
It was a pleasure to learn more about your [innovative strategy / upcoming challenges / core values / industry insights]. I was also thinking about what you said regarding {{ topic discussed }}. In my last role as [your current or most recent position] I found that [data-backed explanation of how you would tackle the issue in question].
Finally, attached you will find the details of some of my projects we talked about. Please feel free to contact me if you find you need any more information.
I look forward to our call next week as discussed.
Thank you once again, {{ hiring manager name }}.
Best regards,
[Your name]