@Jonah Yes, it's possible. You'll need to use microhook-post-list.html to accomplish it. Here's an example use case of that specific microhook (not what you're wanting, but you can use the tutorial to see how it works).
Combine the use of that microhook with this and you can get what you want.
If you want the typical Tiny Theme layout, you can start your microhook using the code found in lines 6-72 here.
This is not the easiest change, but it's definitely doable.